Show the user their camera at the top of the camera menu

- The camera menu leads with the user's own camera, with the effect in force, full width at sixteen by nine: a background is judged by how it looks rather than by its thumbnail. - It shows the pipeline's own track again, not a second capture. Each provider keeps the camera its pipeline is synced to, before joining and after, and hands it out with its state, so two calls on a page keep their own. It is reported again only when it changes, which keeps the preview from blanking on every change of state. - It and the pre-join preview share useAttachedTrack, which detaches only its own element: the pre-join preview detached every element showing its track, the menu's among them. - Paid for out of the list's share of the call, so a menu with it is no taller: at the top where the list keeps its floor after paying, else first among the options, scrolling away with them. Its size comes from the tokens the stylesheets draw it with, so it is placed once. - While the first effect is prepared the preview shows the wait; with the camera off it says so, and an effect can still be chosen. - The video is rounded itself as well as clipped by its frame: Firefox composites it on a layer of its own, which the frame's rounded clip didn't reach at 100% zoom. Confirmed by hand, as headless Firefox draws it rounded either way. - Every camera story shows the preview, with a stand-in camera drawn to a stream. End to end on Chromium and Firefox, the lobby's menu shows the camera and then the chosen picture. Rebased onto main, where the call's camera is the MatrixRTC SDK's track rather than LiveKit's, and the Publisher that synced it is gone: - The synced camera is a ShownCamera, which LiveKit's preview track and the SDK's call track both fill; useAttachedTrack and SelfPreview take that. - CallViewModel exposes camera$, and the call view reports it with reportCamera, the same reporting the lobby's sync uses. An end-to-end test checks the call's menu shows the call's camera, then the picture. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
2026-11-13 01:12:29 +00:00 · 2026-11-06 10:58:46 +01:00
92 changed files with 973 additions and 1395 deletions
@@ -1,35 +0,0 @@
---
-name: handoff
-description: Implement the first cut of a task and stop for a direction check before the quality pass.
-argument-hint: <the task>
-disable-model-invocation: true
---
-
-Task: $ARGUMENTS
-
-Stop after the first implementation and hand it back before the quality pass.
-
-## Before the hand-off
-
- Run the narrowest check that rules out an obviously broken hand-off: the test
-  file for the touched code, `tsc` on its own, a single story. Not the full
-  `pnpm lint`, not the whole suite.
- If a wider check is needed before feedback can be useful, keep it to the touched
-  code and say why it was needed.
- Leave wider refactors, extra tests and documentation polish out. They are
-  follow-up work, not part of the first hand-off.
-
-## The hand-off
-
-Stop and ask whether the direction is right. The message says:
-
- what was built and where, in a few lines,
- which check ran and what it returned, verbatim if it failed,
- what was left out on purpose,
- the decisions that could have gone another way.
-
-Do not continue past this point on your own.
-
-## After the user confirms
-
-The skill ends here. Continue with the quality pass as usual.
@@ -14,7 +14,7 @@ permissions:
 jobs:
  prevent-blocked:
    name: Prevent blocked
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    permissions:
      pull-requests: read
    steps:
@@ -17,7 +17,7 @@ env:
 jobs:
  build_and_deploy:
    name: Build & publish docker
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    permissions:
      contents: write # required to upload release asset
      packages: write # needed for publishing packages to GHCR
@@ -29,7 +29,7 @@ on:
 jobs:
  build:
    name: Build Element Call
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
@@ -25,7 +25,7 @@ jobs:
    # Deploy main branch to call.element.dev after build completes
    if: github.ref == 'refs/heads/main'
    needs: build_full_element_call
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    steps:
      - name: Deploy to call.element.dev
        uses: actions/github-script@d7906e4ad0b1822421a7e6a35d5ca353c962f410 # v6
@@ -92,7 +92,7 @@ jobs:
  build_storybook:
    name: Build Storybook
    if: contains(github.event.pull_request.labels.*.name, 'storybook build')
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
@@ -13,7 +13,7 @@ permissions:

 jobs:
  pr-changelog-label:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    steps:
      - uses: yogevbd/enforce-label-action@a3c219da6b8fa73f6ba62b68ff09c469b3a1c024 # 2.2.2
        with:
@@ -13,7 +13,7 @@ jobs:
    name: Review
    # Only run on labelling and skip forks.
    if: github.event.label.name == 'Claude-Review' && github.event.pull_request.head.repo.full_name == github.repository
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@11d5960a326750d5838078e36cf38b85af677262 # v4.4.0
@@ -32,7 +32,7 @@ on:

 jobs:
  deploy:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    permissions:
      deployments: write
    environment: Netlify
@@ -10,7 +10,7 @@ on:
 jobs:
  lint:
    name: Lint, format & type check
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
@@ -17,7 +17,7 @@ jobs:
      github.event.workflow_run.conclusion == 'success' &&
      github.event.workflow_run.event == 'pull_request' &&
      github.event.workflow_run.head_repository.full_name == github.repository
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    outputs:
      pr_number: ${{ steps.prdetails.outputs.pr_id }}
      pr_data_json: ${{ steps.prdetails.outputs.data }}
@@ -17,7 +17,7 @@ permissions: {}
 jobs:
  versioning:
    name: Versioning
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    outputs:
      DRY_RUN: ${{ steps.dry_run.outputs.DRY_RUN }}
      PREFIXED_VERSION: ${{ steps.prefixed_version.outputs.PREFIXED_VERSION }}
@@ -59,7 +59,7 @@ jobs:
  publish_npm:
    needs: versioning
    name: Publish NPM
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    outputs:
      ARTIFACT_VERSION: ${{ steps.artifact_version.outputs.ARTIFACT_VERSION }}
    permissions:
@@ -111,7 +111,7 @@ jobs:
    needs: [versioning, publish_npm]
    if: ${{ needs.versioning.outputs.DRY_RUN == 'false' }}
    name: Update release notes
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    # Shared with publish-embedded-packages.yaml, which appends to the same release: two
    # appends at once would each write back the body without the other's section
    concurrency:
@@ -14,7 +14,7 @@ on:
 jobs:
  versioning:
    name: Versioning
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    outputs:
      DRY_RUN: ${{ steps.dry_run.outputs.DRY_RUN }}
      PREFIXED_VERSION: ${{ steps.prefixed_version.outputs.PREFIXED_VERSION }}
@@ -76,7 +76,7 @@ jobs:
    needs: [build_element_call, versioning]
    if: always()
    name: Publish tarball
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    permissions:
      contents: write # required to upload release asset
    steps:
@@ -107,7 +107,7 @@ jobs:
    needs: [build_element_call, versioning]
    if: always()
    name: Publish NPM
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    outputs:
      ARTIFACT_VERSION: ${{ steps.artifact_version.outputs.ARTIFACT_VERSION }}
    permissions:
@@ -152,7 +152,7 @@ jobs:
    needs: [build_element_call, versioning]
    if: always()
    name: Publish Android AAR
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    outputs:
      ARTIFACT_VERSION: ${{ steps.artifact_version.outputs.ARTIFACT_VERSION }}
    permissions:
@@ -212,7 +212,7 @@ jobs:
    needs: [build_element_call, versioning]
    if: always()
    name: Publish SwiftPM Library
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    outputs:
      ARTIFACT_VERSION: ${{ steps.artifact_version.outputs.ARTIFACT_VERSION }}
    permissions:
@@ -282,7 +282,7 @@ jobs:
    needs: [versioning, publish_npm, publish_android, publish_ios]
    if: always()
    name: Update release notes
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    # Shared with publish-component.yaml, which appends to the same release: two appends
    # at once would each write back the body without the other's section
    concurrency:
@@ -23,7 +23,7 @@ jobs:
    needs: build_element_call
    if: always()
    name: Publish tarball
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    permissions:
      contents: write # required to upload release asset
      packages: write
@@ -68,7 +68,7 @@ jobs:
  add_docker_release_note:
    needs: publish_docker
    name: Add docker release note
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    steps:
      - name: Add release note
        uses: softprops/action-gh-release@3bb12739c298aeb8a4eeaf626c5b8d85266b0e65 # v2
@@ -25,7 +25,7 @@ on:
 jobs:
  vitest:
    name: Run unit tests
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    steps:
      - name: Checkout code
        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
@@ -71,27 +71,10 @@ jobs:
          flags: unittests
          fail_ci_if_error: true
  playwright:
-    name: Run end-to-end tests (${{ matrix.part }})
+    name: Run end-to-end tests
    if: ${{ !inputs.disable_e2e_tests }}
    timeout-minutes: 60
-    runs-on: ubuntu-24.04
-    # We manually shard the tests across runners. Playwright's own shards cut
-    # the list of tests into equal counts in file order, which would leave the
-    # widget suite, the slowest tests by far, together at the end.
-    strategy:
-      fail-fast: false
-      matrix:
-        include:
-          - part: chromium-1
-            args: --project=chromium --shard=1/2
-          - part: chromium-2
-            args: --project=chromium --shard=2/2
-          - part: widget-1
-            args: --project=widget --shard=1/2
-          - part: widget-2
-            args: --project=widget --shard=2/2
-          - part: firefox-mobile
-            args: --project=firefox --project=mobile
+    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4
        with:
@@ -124,64 +107,17 @@ jobs:
        run: pnpm playwright install --with-deps
      - name: Run backend components
        run: |
-          # Make sure the directory for the embedded build exists as Docker might
-          # create it with wrong access rights otherwise.
-          mkdir -p embedded/web/dist
          docker compose -f docker-compose-dev.yml -f docker-compose-playwright.yml pull
          docker compose -f docker-compose-dev.yml -f docker-compose-playwright.yml up -d
          docker ps
      - name: Run Playwright tests
        env:
          USE_DOCKER: 1
-          ARGS: ${{ matrix.args }}
-        # Unquoted on purpose: the part's arguments are several words
-        run: pnpm exec playwright test $ARGS
+        run: pnpm exec playwright test
      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        if: ${{ !cancelled() }}
-        with:
-          name: blob-report-${{ matrix.part }}
-          path: blob-report
-          if-no-files-found: error
-          # Only read by the merge below.
-          retention-days: 1
-
-  e2e_report:
-    # Combines the blobs into a single HTML report and blocks PRs on failure.
-    name: Run end-to-end tests
-    needs: playwright
-    if: ${{ always() && !inputs.disable_e2e_tests }}
-    runs-on: ubuntu-24.04
-    steps:
-      - uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
-        with:
-          # Inside a called workflow, github.repository is the caller so we need to make sure to still check out the EC repo here.
-          repository: ${{ inputs.matrix-js-sdk-sha && 'element-hq/element-call' || github.repository }}
-          persist-credentials: false
-      - name: Enable Corepack
-        run: corepack enable
-      - uses: actions/setup-node@49933ea5288caeca8642d1e84afbd3f7d6820020 # v4
-        with:
-          cache: "pnpm"
-          node-version-file: ".node-version"
-      - name: Install dependencies
-        run: scripts/layered.sh --ignore-pnpmfile
-        env:
-          PR_HEAD_REPO_OWNER: ${{ github.event.pull_request.head.repo.owner.login }}
-          JS_SDK_GITHUB_BASE_REF: ${{ inputs.matrix-js-sdk-sha }}
-      - name: Download the parts' reports
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4
-        with:
-          pattern: blob-report-*
-          path: all-blob-reports
-          merge-multiple: true
-      - name: Merge into one HTML report
-        run: pnpm exec playwright merge-reports --reporter html ./all-blob-reports
-      - uses: actions/upload-artifact@043fb46d1a93c77aae656e7c1c64a875d1fc6a0a # v7.0.1
        with:
          name: html-report
          path: playwright-report
          if-no-files-found: error
          retention-days: 4
-      - name: Fail on a failed part
-        if: ${{ needs.playwright.result != 'success' }}
-        run: exit 1
@@ -7,7 +7,7 @@ on:

 jobs:
  download:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    permissions:
      contents: read

@@ -8,7 +8,7 @@ on:

 jobs:
  upload:
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    permissions:
      contents: read

@@ -10,7 +10,7 @@ permissions: {}
 jobs:
  zizmor:
    name: Run zizmor 🌈
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
    permissions:
      security-events: write # Required for upload-sarif (used by zizmor-action) to upload SARIF files.
    steps:
@@ -44,7 +44,3 @@ storybook-static

 # Nested checkout made by scripts/layered.sh
 /matrix-js-sdk/
-
-# Claude
-/.claude/*
-!/.claude/skills/
@@ -16,35 +16,19 @@ host's page. It is the MatrixRTC reference implementation.
  `@media`, global `i18next` or the `widget` global — take it from a provider.
 - The change works standalone, as a widget and as a component. Say what you checked.
 - Every gate below is green before you push.
+- Hand off after the first implementation, before the quality pass. Then commit on
+  the user's word where the setup allows it, or hand them the message.

 ## Read before you

 | …                                | …                                                          |
 | -------------------------------- | ---------------------------------------------------------- |
+| start a task of any size         | [docs/agents/workflow.md](docs/agents/workflow.md)         |
 | touch call logic or a view model | [docs/agents/architecture.md](docs/agents/architecture.md) |
 | write any code                   | [docs/agents/code-style.md](docs/agents/code-style.md)     |
 | write a test, story or e2e spec  | [docs/agents/testing.md](docs/agents/testing.md)           |
 | open a PR                        | [CONTRIBUTING.md](CONTRIBUTING.md)                         |
-
-## Scratch files live in `agent-workspace/`
-
-Git-ignored. One kebab-case subfolder per task, matching the branch topic:
-`agent-workspace/<slug>/`.
-
-| File                        | Purpose                                                                          |
-| --------------------------- | -------------------------------------------------------------------------------- |
-| `plan.md`                   | The concrete approach — files, symbols, edit order — once direction is confirmed |
-| `commit-msg.txt`            | `git commit -F agent-workspace/<slug>/commit-msg.txt`                            |
-| `pr-body.md`                | `gh pr create --body-file agent-workspace/<slug>/pr-body.md`                     |
-| `implementation-summary.md` | What was built, decisions, trade-offs                                            |
-| `NN-prompt.md`              | Raw prompt text, numbered, when worth keeping                                    |
-
- Nothing here is durable. The folder is ignored, so anything worth keeping is
-  promoted into the PR body or a doc before the task ends.
- Never write scratch files to the repo root. Stray `load_test_summary.md` and
-  `config.json_` files are what this folder prevents.
- Start `pr-body.md` from `.github/PULL_REQUEST_TEMPLATE.md` and fill every
-  section.
+| implement from a feature spec    | [FEATURES_SPEC/AGENTS.md](FEATURES_SPEC/AGENTS.md)         |

 ## Gates

@@ -58,11 +42,6 @@ pnpm i18n:check
 `knip` fails on dead code; a file deliberately inert ahead of its consumer goes in
 `knip.ts` `ignoreFiles` with a reason.

-Ready means every gate is green and the change is covered at the layers
-[testing.md](docs/agents/testing.md) asks for. Read the diff against
-[code-style.md](docs/agents/code-style.md) first. Re-run the whole checklist after
-any fix.
-
 ## A good PR

 - One slice, under ~400 changed lines, green on its own, linked to its issue.
@@ -221,68 +221,119 @@ See also:

 - [Developing with linked packages](./docs/linking.md)

-#### Element Call as a component
+#### Element Call as a component (experimental)

-Element Call can be rendered inside another React app instead of an iframe.
-The host supplies its own Matrix client, and the call stays inside the element
-it is mounted in.
+Element Call can also be embedded directly into another React application
+rather than being loaded in an iframe as a widget. `pnpm build:component`
+builds it as a library into `component/dist` (the bundle, its stylesheet and
+type declarations), and

-##### Install
+```sh
+pnpm dev:component
+```
+
+serves a harness on port 3001 that stands in for such an application: it signs
+in twice against the development backend and shows two calls side by side, in
+resizable boxes, with page furniture of its own around them. Use it to see how
+Element Call behaves when it does not own the page — the size it is given,
+whether it stays inside its container, and what it says to its host, which is
+logged along the bottom. The harness is served with the same development
+certificate as the app, so unless the development CA is trusted, the browser
+needs a certificate exception for `https://localhost:3001` as well (see the
+note under [Backend](#backend)). It reads the same `public/config.json` as
+`pnpm dev` if one exists, and runs with Element Call's defaults otherwise.
+
+The call lays itself out for the size of the element it is mounted in, not the
+window: a host that shrinks the container to a corner of its page gets the
+picture-in-picture layout, just as a host that shrank the whole iframe used to.
+The breakpoints in the stylesheets the component uses are
+`@container element-call` queries against its root element for the same reason;
+for the standalone app the root is the page, so they mean what the media queries
+they replaced did. (The standalone-only views, such as the home and login pages,
+still use plain media queries, since the component never shows them.)
+
+The component's stylesheet is confined to the element it is mounted in: the
+build rewrites every selector so that it matches only Element Call's root or
+what is inside it, with `html`, `body` and `:root` standing for that root (see
+`component/build/scopeStylesToRoot.ts`). A host's own page keeps its styles,
+and Element Call brings its own fonts and design tokens along.
+
+The component speaks every language the app does. English is bundled in; the
+other locales are split into chunks the host's bundler loads the first time
+they are needed. It starts in the browser's language, and follows the host's
+own language setting through the `language` prop (`supportedLanguages` lists
+the tags it accepts, and anything else falls back to its base language or to
+English). The `theme` prop works the same way and takes the same values as the
+widget's `theme` URL parameter: `light`, `dark`, `light-high-contrast` or
+`dark-high-contrast`. Both can change while a call is running without
+disturbing it.
+
+A host must call and await `initializeElementCall(config)` once before
+rendering the component: it loads the `Intl` polyfills, applies the
+deployment-wide `config.json`-style configuration and sets up translations.
+The component itself takes the host's `client` and the `roomId` to call in, an
+`intent` saying what the user asked for (which decides whether to show the
+lobby, ring, and so on), an optional `config` overriding what the intent
+implies, and an optional `hostBridge` through which Element Call tells the host
+that the user has joined or hung up, that it wants to stay on screen, and so
+on. The host makes its own requests (`join`, `hangUp`, `setDeviceMute`) through
+the handle exposed on `ref`. The full API is documented in the type declarations
+(`component/index.tsx` and `component/host.ts`).
+
+A few things differ from the widget on purpose: the component draws a solid
+background rather than a gradient unless told otherwise, never offers to edit
+the user's profile (the account is the host's), scopes its keyboard shortcuts to
+its own root element so that several instances can share a page, and only shows
+its own post-call and error screens when the host has not supplied a `close()`
+callback; with one, it asks the host to unmount it instead. The
+[global JS controls](./docs/controls.md) on `window` are unchanged and remain
+page-wide, so with several instances on one page they apply to all of them.
+
+Each release publishes the package to npm, with the same version as the release:

 ```sh
 npm install @element-hq/element-call-component
 ```

-Releases publish the package with the same version as Element Call. For an
-unreleased commit, depend on this repository directly:
+To use an unreleased commit, a host can instead install it as a git dependency
+on the `component` directory of this repository,

 ```json
 "@element-hq/element-call-component": "github:element-hq/element-call#main&path:/component"
 ```

-This builds on install, so the host needs pnpm (via Corepack) and must allow
-the build (`allowBuilds` in its `pnpm-workspace.yaml`).
+whose `prepare` script runs the build on install. That build needs pnpm (via
+Corepack) on the host's machine, runs a full `pnpm install` of this repository,
+since it inherits the `--max-old-space-size` setting of
+the app build; the host's pnpm also has to allow it to run at all
+(`allowBuilds` in its `pnpm-workspace.yaml`). Note that `component/` is a pnpm
+project of its own for this reason, so pnpm commands run from inside that
+directory target it rather than the repository; run them from the repository
+root. The host imports the component from
+`@element-hq/element-call-component` and the stylesheet from
+`@element-hq/element-call-component/style.css`, and has to provide `react`,
+`react-dom`, `matrix-js-sdk`, `@vector-im/compound-web` and
+`@vector-im/compound-design-tokens` itself, since the bundle leaves them
+external.
+Compound's stylesheet are the host's to load too: the component shares
+the host's copy of Compound, (required for example for tooltips)

-##### Use
+The component is large, and a host will usually load it lazily, only once a
+call is shown. Everything a host needs in order to talk about a call before
+then is also exported
+from `@element-hq/element-call-component/api` (a small entry point that does not
+load the component).

-1. Provide the externals yourself: `react`, `react-dom`, `matrix-js-sdk`,
-   `@vector-im/compound-web`, `@vector-im/compound-design-tokens`, and
-   Compound's stylesheet.
-2. Import `@element-hq/element-call-component/style.css`.
-3. Await `initializeElementCall(config)` once before rendering.
-4. Render the component with `client`, `roomId` and an `intent`; optionally
-   pass `config`, `hostBridge`, `language` and `theme` (both can change
-   mid-call). Control it through the `ref` handle (`join`, `hangUp`,
-   `setDeviceMute`).
-
-Load the component lazily. Types, enums and `configurationForIntent` are
-available without it from `@element-hq/element-call-component/api`. The full
-API is in `component/index.tsx`, `component/api.ts` and `component/host.ts`.
-
-##### How it differs from the widget
-
- It lays out for its container, not the window: a small container gets the
-  picture-in-picture layout.
- Its styles and keyboard shortcuts are scoped to its root, so the host page is
-  untouched and several instances can share a page. The
-  [global JS controls](./docs/controls.md) stay page-wide.
- It draws a solid background by default and never offers profile editing.
- If the host bridge implements `close()`, it asks to be unmounted instead of
-  showing its own post-call and error screens.
- Sounds, images and the MediaPipe runtime are separate files the host's
-  bundler copies (webpack 5, Vite, Rollup); MediaPipe is fetched only when a
-  background effect is first used.
-
-##### Develop
-
- `pnpm build:component` builds the library into `component/dist`.
- `pnpm dev:component` serves a test host on `https://localhost:3001`: two
-  calls side by side in resizable boxes, with host messages logged at the
-  bottom. It uses the development backend, `public/config.json` if present,
-  and needs the same certificate exception as `pnpm dev` (see
-  [Backend](#backend)).
- Run pnpm commands from the repository root; `component/` is its own pnpm
-  project.
+- props and the types they are made of
+- the handle
+- the host bridge
+- `UserIntent`
+- `HeaderStyle`
+- `BackgroundStyle` enums
+- `configurationForIntent`, the defaults each intent implies
+  Import from it wherever a value such as
+  `BackgroundStyle.Solid` is needed on a path that must stay light; the main
+  entry point re-exports all of it too.

 ### Backend

@@ -26,7 +26,8 @@
  "features": {
    "feature_element_call_video_rooms": true,
    "feature_video_rooms": true,
-    "feature_group_calls": true
+    "feature_group_calls": true,
+    "feature_release_announcement": false
  },
  "default_federate": true,
  "default_theme": "light",
@@ -39,10 +40,7 @@
  },
  "setting_defaults": {
    "breadcrumbs": true,
-    "feature_group_calls": true,
-    "releaseAnnouncementData": {
-      "room_list_section": true
-    }
+    "feature_group_calls": true
  },
  "jitsi": {
    "preferred_domain": "meet.element.io"
@@ -26,7 +26,8 @@
  "features": {
    "feature_element_call_video_rooms": true,
    "feature_video_rooms": true,
-    "feature_group_calls": true
+    "feature_group_calls": true,
+    "feature_release_announcement": false
  },
  "default_federate": true,
  "default_theme": "light",
@@ -39,10 +40,7 @@
  },
  "setting_defaults": {
    "breadcrumbs": true,
-    "feature_group_calls": true,
-    "releaseAnnouncementData": {
-      "room_list_section": true
-    }
+    "feature_group_calls": true
  },
  "jitsi": {
    "preferred_domain": "meet.element.io"
@@ -19,12 +19,7 @@ services:
      - ./backend/playwright_homeserver-othersite.yaml:/data/cfg/homeserver.yaml:Z
  element-web:
    # Pin to a SHA so that upstream cannot break our tests. Renovate handles regular updates.
-    image: ghcr.io/element-hq/element-web:develop@sha256:72791f0b2541208f8f7edd9c6b5a7eaf88accd8ed1f0c4db1bc62bfe18eb90fe
+    image: ghcr.io/element-hq/element-web:develop@sha256:e063472b6bdf6d0bfa1d43dfa4ef7effee1efd2c9684daee665d1bedfe746a47
  element-web-1:
    # Pin to a SHA so that upstream cannot break our tests. Renovate handles regular updates.
-    image: ghcr.io/element-hq/element-web:develop@sha256:72791f0b2541208f8f7edd9c6b5a7eaf88accd8ed1f0c4db1bc62bfe18eb90fe
-    volumes:
-      # The other site opens the embedded package under test in place of the
-      # copy its image bundles (the first site opens the dev server's app.
-      # Built by the Playwright run (see build.setup.ts).
-      - ./embedded/web/dist:/app/widgets/element-call:ro,Z
+    image: ghcr.io/element-hq/element-web:develop@sha256:e063472b6bdf6d0bfa1d43dfa4ef7effee1efd2c9684daee665d1bedfe746a47
@@ -14,11 +14,7 @@ This folder contains documentation for setup, usage, and development of Element

 Entry point: [AGENTS.md](../AGENTS.md).

+- [Agent workflow](./agents/workflow.md)
 - [Architecture](./agents/architecture.md)
 - [Code style](./agents/code-style.md)
 - [Testing](./agents/testing.md)
-
-Opt-in skills in [`.claude/skills/`](../.claude/skills/):
-
- `/handoff <task>` — get the first implementation back for a direction check
-  before lint, the full suite and polish.
@@ -34,10 +34,6 @@ translations. The browser is Playwright's, so a fresh clone needs

 ## End-to-end

-The Element Web instance `HOST1` opens the app the dev server serves. The instance
-`HOST2` (the other site) opens the embedded package as a host ships it. This package
-is built by the `build-embedded` setup project and mounted in `docker-compose-playwright.yml`.
-
 - `playwright/*.spec.ts` — standalone, on Chromium and Firefox.
 - `playwright/widget/` — widget mode, where cross-context bugs surface.
 - `playwright/component/` — the component in a host page, via the harness on port
@@ -52,8 +48,6 @@ Test what a user observes: the peer sees the change, it survives a reconnect, it
 right after a reload. Reuse `playwright/spa-helpers.ts`,
 `playwright/widget/test-helpers.ts`, `playwright/fixtures/`.

-To mark new release announcements as viewed, add them in `backend/ew.test*.config.json`.
-
 ```sh
 pnpm test                   # unit + storybook
 pnpm backend                # Synapse + LiveKit, required for e2e
@@ -0,0 +1,50 @@
+# Agent workflow
+
+## Scratch files live in `agent-workspace/`
+
+Git-ignored. One kebab-case subfolder per task, matching the branch topic:
+`agent-workspace/<slug>/`.
+
+| File                        | Purpose                                                                          |
+| --------------------------- | -------------------------------------------------------------------------------- |
+| `plan.md`                   | The concrete approach — files, symbols, edit order — once direction is confirmed |
+| `commit-msg.txt`            | `git commit -F agent-workspace/<slug>/commit-msg.txt`                            |
+| `pr-body.md`                | `gh pr create --body-file agent-workspace/<slug>/pr-body.md`                     |
+| `implementation-summary.md` | What was built, decisions, trade-offs                                            |
+| `NN-prompt.md`              | Raw prompt text, numbered, when worth keeping                                    |
+
+- Nothing here is durable. The folder is ignored, so anything worth keeping is
+  promoted into the PR body, a doc, or a feature spec before the task ends.
+- Never write scratch files to the repo root. Stray `load_test_summary.md` and
+  `config.json_` files are what this folder prevents.
+- Start `pr-body.md` from `.github/PULL_REQUEST_TEMPLATE.md` and fill every
+  section.
+- Commit subjects are plain imperative English. No conventional-commits prefixes.
+- A `plan.md` and a feature spec sit at different altitudes; neither replaces the
+  other. A spec in `FEATURES_SPEC/` is durable and deliberately abstract —
+  behaviour, decisions, acceptance criteria — so the feature can be rebuilt against
+  a `main` nobody has seen yet. A plan is one slice of it landing on today's
+  `main`: the paths, symbols and edit order the spec's decisions and criteria must
+  not name. `FEATURES_SPEC/AGENTS.md` wins wherever the two genuinely overlap.
+
+## Hand off before the quality pass
+
+- Implement the change, run the narrowest check that rules out an obviously broken
+  handoff, then stop and ask whether the direction is right.
+- Full `pnpm lint`, the whole suite, coverage and benchmarks come after the
+  direction is confirmed.
+- Wider refactors, extra tests and documentation polish are follow-up work, not
+  part of the first handoff.
+- If a check is needed before feedback, keep it to the touched code and say why.
+
+## Commit and PR readiness
+
+- Commit once the user confirms direction, or asks for one. Not before. Where the
+  setup has no git identity, a sandbox included, write the message to
+  `commit-msg.txt` and hand it over instead.
+- Ready means every gate in [AGENTS.md](../../AGENTS.md#gates) is green and the
+  change is covered at the layers [testing.md](./testing.md) asks for. Read the diff
+  against [code-style.md](./code-style.md) first.
+- Re-run the whole checklist after any fix. Only on green, either way.
+- Once a human has started reviewing, fix forward — never force-push a
+  regeneration over a review in progress.
@@ -107,7 +107,7 @@
    "livekit-client": "^2.18.1",
    "lodash-es": "^4.17.21",
    "loglevel": "^1.9.1",
-    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#dc8610e796c92553c658300a4882dde961a0678a",
+    "matrix-js-sdk": "github:matrix-org/matrix-js-sdk#a9ef09fbf2f1644c8663d0aeaf6a921cd16e7b01",
    "matrix-widget-api": "^1.18.0",
    "node-stdlib-browser": "^1.3.1",
    "normalize.css": "^8.0.1",
@@ -26,19 +26,6 @@ process.env.NODE_EXTRA_CA_CERTS = join(
  "backend/dev_tls_local-ca.crt",
 );

-const desktopChrome = {
-  ...devices["Desktop Chrome"],
-  permissions: ["clipboard-write", "clipboard-read", "microphone", "camera"],
-  ignoreHTTPSErrors: true,
-  launchOptions: {
-    args: [
-      "--use-fake-ui-for-media-stream",
-      "--use-fake-device-for-media-stream",
-      "--mute-audio",
-    ],
-  },
-};
-
 /**
 * See https://playwright.dev/docs/test-configuration.
 */
@@ -56,11 +43,11 @@ export default defineConfig({
   * Reporter to use. See https://playwright.dev/docs/test-reporters
   *
   * On CI, `list` prints a line per test as it finishes, which keeps the job
-   * log moving; `github` annotates failures on the PR; the `blob` format is
-   * uploaded by sharded CI runs and combined into a HTML report by the workflow.
+   * log moving; `github` annotates failures on the PR; `html` is uploaded as
+   * an artifact and must never try to open a browser there.
   */
  reporter: process.env.CI
-    ? [["list"], ["github"], ["blob"]]
+    ? [["list"], ["github"], ["html", { open: "never" }]]
    : [["list"], ["html"]],
  /* Stop a broken run early on CI instead of waiting out every retry. */
  maxFailures: process.env.CI ? 5 : undefined,
@@ -76,28 +63,29 @@ export default defineConfig({
  },
  /* Configure projects for major browsers */
  projects: [
-    {
-      // Builds the embedded package into the directory the other site's
-      // Element Web container serves it from (see docker-compose-playwright.yml).
-      name: "build-embedded",
-      testMatch: "**/widget/embedded/build.setup.ts",
-    },
    {
      name: "chromium",
-      testIgnore: ["**/mobile/**", "**/widget/**"],
-      use: desktopChrome,
-    },
-    {
-      // Element Call as a widget in Element Web, on Chromium. This uses its
-      // own project so that it can be sharded on CI.
-      name: "widget",
-      dependencies: ["build-embedded"],
-      testMatch: "**/widget/**/*.@(spec|test).ts",
-      use: desktopChrome,
+      testIgnore: "**/mobile/**",
+      use: {
+        ...devices["Desktop Chrome"],
+        permissions: [
+          "clipboard-write",
+          "clipboard-read",
+          "microphone",
+          "camera",
+        ],
+        ignoreHTTPSErrors: true,
+        launchOptions: {
+          args: [
+            "--use-fake-ui-for-media-stream",
+            "--use-fake-device-for-media-stream",
+            "--mute-audio",
+          ],
+        },
+      },
    },
    {
      name: "firefox",
-      dependencies: ["build-embedded"],
      testIgnore: "**/mobile/**",
      use: {
        ...devices["Desktop Firefox"],
@@ -211,46 +211,6 @@ test.describe("background effects section", () => {
  });
 });

-test.describe("a pipeline that fails to build", () => {
-  test("offers no effects for the session, and keeps the choice", async ({
-    page,
-  }) => {
-    test.setTimeout(120_000);
-    await page.goto("/");
-    await SpaHelpers.createCall(page, "Failing user", "Pipeline fails");
-    const preview = page.locator("video").first();
-    const camera = await cameraColour(preview);
-    await page.route("**/*.tflite*", async (route) => route.abort());
-
-    await page.getByRole("button", { name: "Camera", exact: true }).click();
-    const tile = page.getByRole("menuitemradio", { name: "Background 1" });
-    await tile.click();
-    await expect(
-      page.getByText("Background effects are not supported on this platform."),
-    ).toBeVisible({ timeout: 30_000 });
-    await expect(tile).toBeDisabled();
-    await page.keyboard.press("Escape");
-    // The camera and microphone carry on without it.
-    expect(distance(await cameraColour(preview), camera)).toBeLessThan(30);
-    await expect(page.getByTestId("incall_mute")).toHaveAttribute(
-      "aria-checked",
-      "true",
-    );
-
-    await page.unroute("**/*.tflite*");
-    await page.reload();
-    await expect(page.getByTestId("lobby_joinCall")).toBeVisible();
-    await page.getByRole("button", { name: "Camera", exact: true }).click();
-    await expect(tile).toHaveAttribute("aria-checked", "true");
-    const picture = await averageColour(tile.locator("img"));
-    await expect
-      .poll(async () => distance(await averageColour(preview), picture), {
-        timeout: 60_000,
-      })
-      .toBeLessThan(distance(camera, picture) / 2);
-  });
-});
-
 test.describe("the chosen effect", () => {
  test("chosen effect survives leaving and rejoining", async ({ page }) => {
    test.setTimeout(120_000);
@@ -29,10 +29,47 @@ export interface MyFixtures {
  addUser: (username: string, host: string) => Promise<UserBaseFixture>;
 }

+// Minimal config.json for the local element-web instance
+const CONFIG_JSON = {
+  default_server_config: {
+    "m.homeserver": {
+      base_url: "https://synapse.m.localhost",
+      server_name: "synapse.m.localhost",
+    },
+  },
+
+  element_call: {
+    participant_limit: 8,
+    brand: "Element Call",
+  },
+
+  // The default language is set here for test consistency
+  setting_defaults: {
+    language: "en-GB",
+    feature_group_calls: true,
+  },
+
+  // the location tests want a map style url.
+  map_style_url:
+    "https://api.maptiler.com/maps/streets/style.json?key=fU3vlMsMn4Jb6dnEIFsx",
+
+  features: {
+    // We don't want to go through the feature announcement during the e2e test
+    feature_release_announcement: false,
+    feature_element_call_video_rooms: true,
+    feature_video_rooms: true,
+    feature_group_calls: true,
+  },
+};
+
 export const widgetTest = test.extend<MyFixtures>({
  // allow per-test override: `widgetTest.use({ callType: "dm" })`
  callType: ["room", { option: true }],
-  asWidget: async ({ browser, callType }, pUse) => {
+  asWidget: async ({ browser, context, callType }, pUse) => {
+    await context.route(`http://localhost:8081/config.json*`, async (route) => {
+      await route.fulfill({ json: CONFIG_JSON });
+    });
+
    const brooksDisplayName = `brooks_${Date.now()}`;
    const whistlerDisplayName = `whistler_${Date.now()}`;

@@ -127,14 +164,13 @@ export const widgetTest = test.extend<MyFixtures>({
   * Provide a way to add additional users within a test.
   * The returned user will be registered on the default homeserver, the name will be made unique by appending a timestamp.
   */
-  addUser: async ({ browser }, use, testInfo) => {
+  addUser: async ({ browser }, use) => {
    await use(
      async (
        username: string,
        host: string = HOST1,
      ): Promise<UserBaseFixture> => {
-        // Tests in parallel workers can reach this in the same millisecond.
-        const uniqueSuffix = `${Date.now()}_${testInfo.parallelIndex}`;
+        const uniqueSuffix = Date.now();
        const { page, clientHandle, mxId } = await TestHelpers.registerUser(
          browser,
          `${username.toLowerCase()}_${uniqueSuffix}`,
@@ -1,20 +0,0 @@
-/*
-Copyright 2026 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import { test as setup } from "@playwright/test";
-import { execFileSync } from "node:child_process";
-import { mkdirSync } from "node:fs";
-
-const EMBEDDED_DIST = "embedded/web/dist";
-
-setup("build the embedded package", () => {
-  setup.setTimeout(10 * 60 * 1000);
-  mkdirSync(EMBEDDED_DIST, { recursive: true });
-  execFileSync("pnpm", ["build:embedded", "--outDir", EMBEDDED_DIST], {
-    stdio: "inherit",
-  });
-});
@@ -1,56 +0,0 @@
-/*
-Copyright 2026 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import { expect, type Route } from "@playwright/test";
-
-import { widgetTest } from "../../fixtures/widget-user.ts";
-import { HOST2, TestHelpers } from "../test-helpers.ts";
-
-/** Where the other site's Element Web serves the embedded package from */
-const CONFIG_JSON = "**/widgets/element-call/config.json";
-
-const HOST_ANSWERS: Record<string, (route: Route) => Promise<void>> = {
-  "a 404": async (route) => route.fulfill({ status: 404 }),
-  "a failed fetch": async (route) => route.abort("failed"),
-  "an HTML page": async (route) =>
-    route.fulfill({
-      status: 200,
-      contentType: "text/html",
-      body: "<!doctype html><title>Element</title>",
-    }),
-};
-
-widgetTest.skip(
-  ({ browserName }) => browserName === "firefox",
-  "The widget suite does not run on Firefox, see the other specs here",
-);
-
-for (const [answer, respond] of Object.entries(HOST_ANSWERS)) {
-  widgetTest(
-    `reaches the lobby when config.json gets ${answer}`,
-    async ({ addUser }) => {
-      const { page } = await addUser("Brooks", HOST2);
-      await TestHelpers.createRoom("Config Room", page);
-
-      let answered = 0;
-      await page.route(CONFIG_JSON, async (route) => {
-        answered++;
-        await respond(route);
-      });
-
-      await TestHelpers.startCallInCurrentRoom(page);
-
-      await expect(
-        page
-          .locator('iframe[title="Element Call"]')
-          .contentFrame()
-          .getByTestId("lobby_joinCall"),
-      ).toBeVisible({ timeout: 15000 });
-      expect(answered).toBeGreaterThan(0);
-    },
-  );
-}
@@ -144,11 +144,7 @@ export class TestHelpers {

    await this.dismissStartupToasts(page);

-    // The other site's Element Web opens the embedded package it serves itself
-    // (see docker-compose-playwright.yml), not the dev server's app.
-    if (host !== HOST2) {
-      await TestHelpers.setDevToolElementCallDevUrl(page);
-    }
+    await TestHelpers.setDevToolElementCallDevUrl(page);

    const clientHandle = await page.evaluateHandle(() =>
      window.mxMatrixClientPeg.get(),
@@ -157,10 +153,9 @@ export class TestHelpers {
    return { page, clientHandle, mxId };
  }

-  // Dismisses the toasts a fresh device gets after sign-in.
-  //
-  // Toasts stack and only the top one can be dismissed, so look
-  // at what is on top each time.
+  // Dismisses any toasts that appear on startup, such as "Failed to load service worker" or "Back up your chats".
+  // Toast can be stacked, and only the top one can be dismiss, so just look at what is on top and
+  // dismiss (if part of expected toats)
  public static async dismissStartupToasts(page: Page): Promise<void> {
    const expectedToasts: {
      title: string;
@@ -168,7 +163,6 @@ export class TestHelpers {
      confirm?: string;
    }[] = [
      { title: "Failed to load service worker", button: "OK" },
-      { title: "Verify this device", button: "Later" },
      { title: "Back up your chats", button: "Not now" },
      {
        title: "Turn on key storage",
@@ -219,6 +213,30 @@ export class TestHelpers {
    }
  }

+  /**
+   * Clears what Element Web stacks over the room list after sign-in. The
+   * release announcement is held back while any toast is up, so it is closed
+   * after the toasts, not before.
+   */
+  public static async clearRoomListOverlays(page: Page): Promise<void> {
+    await TestHelpers.dismissStartupToasts(page);
+    await TestHelpers.closeReleaseAnnouncement(page, "Introducing Sections");
+  }
+
+  public static async closeReleaseAnnouncement(
+    page: Page,
+    name: string,
+  ): Promise<void> {
+    try {
+      await page
+        .getByRole("dialog", { name })
+        .getByRole("button", { name: "OK" })
+        .click({ timeout: 2000 });
+    } catch {
+      // Announcement not shown; nothing to do
+    }
+  }
+
  public static async expandAllSections(page: Page): Promise<void> {
    try {
      await page
@@ -264,14 +282,15 @@ export class TestHelpers {
  /**
   * Opens the room list's "New" menu and picks the given item.
   *
-   * Driven by keyboard, as a toast arriving late sits over the button and
-   * swallows clicks.
+   * While the sections announcement is anchored to the "New" button, the
+   * button has no menu at all, so the overlays go first. Driven by keyboard,
+   * as a toast arriving afterwards sits over the button and swallows clicks.
   */
  public static async chooseFromRoomListNewMenu(
    page: Page,
    itemName: string,
  ): Promise<void> {
-    await TestHelpers.dismissStartupToasts(page);
+    await TestHelpers.clearRoomListOverlays(page);
    await page
      .getByRole("navigation", { name: "Room list" })
      .getByRole("button", { name: "New", exact: true })
@@ -408,8 +427,9 @@ export class TestHelpers {
      name: "Toggle Invites section",
    });
    await expect(invitesSection).toBeVisible({ timeout: 10000 });
-    // Toasts sit over the top of the room list, where this header is.
-    await TestHelpers.dismissStartupToasts(page);
+    // Toasts and the announcement sit over the top of the room list, where
+    // this header is
+    await TestHelpers.clearRoomListOverlays(page);
    if ((await invitesSection.getAttribute("aria-expanded")) !== "true") {
      await invitesSection.click();
    }
@@ -8,7 +8,7 @@ overrides:
  '@livekit/components-core>rxjs': ^7.8.1
  '@livekit/track-processors>@mediapipe/tasks-vision': ^0.10.18
  tar: ^7.5.11
-  minimatch: ^11.0.0
+  minimatch: ^10.2.3
  glob: ^10.5.0
  qs: ^6.15.2
  js-yaml: ^4.2.0
@@ -191,8 +191,8 @@ importers:
        specifier: ^1.9.1
        version: 1.9.2
      matrix-js-sdk:
-        specifier: github:matrix-org/matrix-js-sdk#dc8610e796c92553c658300a4882dde961a0678a
-        version: https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/dc8610e796c92553c658300a4882dde961a0678a
+        specifier: github:matrix-org/matrix-js-sdk#a9ef09fbf2f1644c8663d0aeaf6a921cd16e7b01
+        version: https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/a9ef09fbf2f1644c8663d0aeaf6a921cd16e7b01
      matrix-widget-api:
        specifier: ^1.18.0
        version: 1.20.0
@@ -1145,9 +1145,6 @@ packages:
    resolution: {integrity: sha512-O8jcjabXaleOG9DQ0+ARXWZBTfnP4WNAqzuiJK7ll44AmxGKv/J2M4TPjxjY3znBCfvBXFzucm1twdyFybFqEA==}
    engines: {node: '>=12'}

-  '@isaacs/nonrecursive-glob-match@1.0.3':
-    resolution: {integrity: sha512-SI7kyKHq4XXDRozw+r9GlRZkia1ZkFrpLW98r2IC2Bpr8YkFGE3fvjzmxCG0x78A++69HmDNrDvSMYBZmHGpKA==}
-
  '@joshwooding/vite-plugin-react-docgen-typescript@0.7.0':
    resolution: {integrity: sha512-qvsTEwEFefhdirGOPnu9Wp6ChfIwy2dBCRuETU3uE+4cC+PFoxMSiiEhxk4lOluA34eARHA0OxqsEUYDqRMgeQ==}
    peerDependencies:
@@ -3533,8 +3530,8 @@ packages:
  boolbase@1.0.0:
    resolution: {integrity: sha512-JZOSA7Mo9sNGB8+UjSgzdLtokWAky1zbztM3WRLCbZ70/3cTANmQmOdR7y2g+J0e2WXywy1yS468tY+IruqEww==}

-  brace-expansion@5.0.12:
-    resolution: {integrity: sha512-YovQ3rzhaLMIrDjNDMkNS01tea93qhEhG5xy8f6+R0l+dw3Ki+5sCoIoI942iuLZTHWogWktgwVDhU09iNEimQ==}
+  brace-expansion@5.0.9:
+    resolution: {integrity: sha512-ScQ4IuvIEF1TMlP7Zt+vjJ//9zlPb2SDcxWxM3bk8s6t6GGdJ7KO1dCcTidOPJKePW30LE/2cT7wCyPho9/Wxg==}
    engines: {node: 20 || >=22}

  braces@3.0.3:
@@ -4734,8 +4731,8 @@ packages:
  matrix-events-sdk@0.0.1:
    resolution: {integrity: sha512-1QEOsXO+bhyCroIe2/A5OwaxHvBm7EsSQ46DEDn8RBIfQwN5HWBpFvyWWR4QY0KHPPnnJdI99wgRiAl7Ad5qaA==}

-  matrix-js-sdk@https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/dc8610e796c92553c658300a4882dde961a0678a:
-    resolution: {gitHosted: true, integrity: sha512-Ldt/VkCzBtre6m1cn0FqgrzRV0GrgWIoARgQUQO58ef2Edu2ERFCINPzp/psFS5RwoN3RIy9Rm4oPVc1ATkEWA==, tarball: https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/dc8610e796c92553c658300a4882dde961a0678a}
+  matrix-js-sdk@https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/a9ef09fbf2f1644c8663d0aeaf6a921cd16e7b01:
+    resolution: {gitHosted: true, integrity: sha512-ZAhn/zB44MgrXqUzi9ffSFcmZY3+2nx7bEgfEJR7chYDFyT/XmlmfCJx7Ar4rOTAYZJRVnMxrEwiEHGDapUi0Q==, tarball: https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/a9ef09fbf2f1644c8663d0aeaf6a921cd16e7b01}
    version: 45.0.0
    engines: {node: '>=22.0.0'}

@@ -4771,9 +4768,9 @@ packages:
  minimalistic-crypto-utils@1.0.1:
    resolution: {integrity: sha512-JIYlbt6g8i5jKfJ3xz7rF0LXmv2TkDxBLUkiBeZ7bAx4GnnNMr8xFpGnOxn6GhTEHx3SjRrZEoU+j04prX1ktg==}

-  minimatch@11.0.4:
-    resolution: {integrity: sha512-/UJ1dEoVQTjPNDh6SGlUo+ueLMmoHTas4q+8yaAR/5t6nLAIiBDJtoYUh20IYleix7ehiQkgczb84PE3uzHkxg==}
-    engines: {node: 20 || >=22}
+  minimatch@10.2.6:
+    resolution: {integrity: sha512-vpLQEs+VLCr1nU0BXS07maYoFwlDAH0gngQuuttxIwutDFEMHq2blX+8vpgxDdK3J1PwjCJiep77OitTZ4Ll1A==}
+    engines: {node: 18 || 20 || >=22}

  minimist@1.2.8:
    resolution: {integrity: sha512-2yyAR8qBkN3YuheJanUpWC5U3bb5osDywNB8RzDVlDwDHbocAJveqqj1u8+SVD7jkWT4yvsHCpWqqWqAxb0zCA==}
@@ -4946,8 +4943,8 @@ packages:
    resolution: {integrity: sha512-LaNjtRWUBY++zB5nE/NwcaoMylSPk+S+ZHNB1TzdbMJMny6dynpAGt7X/tl/QYq3TIeE6nxHppbo2LGymrG5Pw==}
    engines: {node: '>=10'}

-  p-retry@9.0.0:
-    resolution: {integrity: sha512-HuEats8gYn/UUYa5uyveyQGv75mQmwdFtuMgnZlS12dj/7bdnJSO6keaTjgcZUhvkANTj5EO3lACUmV3xmgj0Q==}
+  p-retry@8.0.1:
+    resolution: {integrity: sha512-NAigyu8hfvJe7MsS18mnc4is0MZtau3QMdBklaJKK23oBQb6occO3UPM3vHmTckW8KhfyjMZaUOqdTFEYliHgg==}
    engines: {node: '>=22'}

  p-try@2.2.0:
@@ -5318,10 +5315,6 @@ packages:
  randomfill@1.0.4:
    resolution: {integrity: sha512-87lcbR8+MhcWcUiQ+9e+Rwx8MyR2P7qnt15ynUlbm3TU/fjbgz4GsvfSUDTemtCCtVCqb4ZcEFlyPNTh9bBTLw==}

-  re2js@2.9.1:
-    resolution: {integrity: sha512-JIT3bEEUZTOR2YS1walNEIfH4cF/cQeZcBUFq7ldqO6lR6g0X5CBq/S8rsa9omzZcsNf8qc36jCkWpKKtncrZg==}
-    engines: {node: '>=20.0.0'}
-
  react-docgen-typescript@2.4.0:
    resolution: {integrity: sha512-ZtAp5XTO5HRzQctjPU0ybY0RRCQO19X/8fxn3w7y2VVTUbGHDKULPTL4ky3vB05euSgG5NpALhEhDPvQ56wvXg==}
    peerDependencies:
@@ -6909,7 +6902,7 @@ snapshots:
      ignore: 5.3.2
      import-fresh: 3.3.1
      js-yaml: 4.3.1
-      minimatch: 11.0.4
+      minimatch: 10.2.6
      strip-json-comments: 3.1.1
    transitivePeerDependencies:
      - supports-color
@@ -6988,7 +6981,7 @@ snapshots:
    dependencies:
      '@humanwhocodes/object-schema': 2.0.3
      debug: 4.4.3(supports-color@7.2.0)
-      minimatch: 11.0.4
+      minimatch: 10.2.6
    transitivePeerDependencies:
      - supports-color

@@ -7124,8 +7117,6 @@ snapshots:
      wrap-ansi: 8.1.0
      wrap-ansi-cjs: wrap-ansi@7.0.0

-  '@isaacs/nonrecursive-glob-match@1.0.3': {}
-
  '@joshwooding/vite-plugin-react-docgen-typescript@0.7.0(typescript@5.9.3)(vite@8.2.4(@types/node@24.13.3)(esbuild@0.28.2)(jiti@2.7.0)(sass@1.103.1)(terser@5.46.1)(yaml@2.9.0))':
    dependencies:
      glob: 10.5.0
@@ -8785,7 +8776,7 @@ snapshots:
      '@typescript-eslint/types': 8.69.0
      '@typescript-eslint/visitor-keys': 8.69.0
      debug: 4.4.3(supports-color@7.2.0)
-      minimatch: 11.0.4
+      minimatch: 10.2.6
      semver: 7.8.5
      tinyglobby: 0.2.17
      ts-api-utils: 2.5.0(typescript@5.9.3)
@@ -8800,7 +8791,7 @@ snapshots:
      '@typescript-eslint/types': 8.72.0
      '@typescript-eslint/visitor-keys': 8.72.0
      debug: 4.4.3(supports-color@7.2.0)
-      minimatch: 11.0.4
+      minimatch: 10.2.6
      semver: 7.8.5
      tinyglobby: 0.2.17
      ts-api-utils: 2.5.0(typescript@5.9.3)
@@ -9125,7 +9116,7 @@ snapshots:

  boolbase@1.0.0: {}

-  brace-expansion@5.0.12:
+  brace-expansion@5.0.9:
    dependencies:
      balanced-match: 4.0.4

@@ -9670,7 +9661,7 @@ snapshots:
      json-stable-stringify-without-jsonify: 1.0.1
      levn: 0.4.1
      lodash.merge: 4.6.2
-      minimatch: 11.0.4
+      minimatch: 10.2.6
      natural-compare: 1.4.0
      optionator: 0.9.4
      strip-ansi: 6.0.1
@@ -9790,7 +9781,7 @@ snapshots:

  filelist@1.0.6:
    dependencies:
-      minimatch: 11.0.4
+      minimatch: 10.2.6

  fill-range@7.1.1:
    dependencies:
@@ -9890,7 +9881,7 @@ snapshots:
    dependencies:
      foreground-child: 3.3.1
      jackspeak: 3.4.3
-      minimatch: 11.0.4
+      minimatch: 10.2.6
      minipass: 7.1.3
      package-json-from-dist: 1.0.1
      path-scurry: 1.11.1
@@ -10015,7 +10006,7 @@ snapshots:
      jiti: 2.7.0
      jsonc-parser: 3.3.1
      magic-string: 1.2.3
-      minimatch: 11.0.4
+      minimatch: 10.2.6
      ora: 9.4.1
      react: 19.2.8
      react-i18next: 17.0.13(i18next@26.4.1(typescript@5.9.3))(react-dom@19.2.8(react@19.2.8))(react@19.2.8)(typescript@5.9.3)
@@ -10413,7 +10404,7 @@ snapshots:

  matrix-events-sdk@0.0.1: {}

-  matrix-js-sdk@https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/dc8610e796c92553c658300a4882dde961a0678a:
+  matrix-js-sdk@https://codeload.github.com/matrix-org/matrix-js-sdk/tar.gz/a9ef09fbf2f1644c8663d0aeaf6a921cd16e7b01:
    dependencies:
      '@babel/runtime': 8.0.8
      '@matrix-org/matrix-sdk-crypto-wasm': 18.9.0
@@ -10423,8 +10414,7 @@ snapshots:
      loglevel: 1.9.2
      matrix-events-sdk: 0.0.1
      matrix-widget-api: 1.20.0
-      p-retry: 9.0.0
-      re2js: 2.9.1
+      p-retry: 8.0.1
      sdp-transform: 3.0.0
      unhomoglyph: 1.0.6

@@ -10459,10 +10449,9 @@ snapshots:

  minimalistic-crypto-utils@1.0.1: {}

-  minimatch@11.0.4:
+  minimatch@10.2.6:
    dependencies:
-      '@isaacs/nonrecursive-glob-match': 1.0.3
-      brace-expansion: 5.0.12
+      brace-expansion: 5.0.9

  minimist@1.2.8: {}

@@ -10746,7 +10735,7 @@ snapshots:
    dependencies:
      p-limit: 3.1.0

-  p-retry@9.0.0:
+  p-retry@8.0.1:
    dependencies:
      is-network-error: 1.3.2

@@ -11170,8 +11159,6 @@ snapshots:
      randombytes: 2.1.0
      safe-buffer: 5.2.1

-  re2js@2.9.1: {}
-
  react-docgen-typescript@2.4.0(typescript@5.9.3):
    dependencies:
      typescript: 5.9.3
@@ -27,7 +27,7 @@ overrides:
  # Security fixes:
  # - https://github.com/advisories/GHSA-7r86-cg39-jmmj
  # - https://github.com/advisories/GHSA-23c5-xmqv-rm74
-  "minimatch": "^11.0.0"
+  "minimatch": "^10.2.3"
  # Security fix: https://github.com/element-hq/element-call/security/dependabot/109
  "glob": "^10.5.0"
  # Security fixes:
@@ -162,7 +162,6 @@ describe("createLocalMedia", () => {
    media.release("camera");
    expect(trackBehind(camera).stop).toHaveBeenCalled();
    expect(media.tracks$.value).toEqual([microphone]);
-    expect(media.requests.map((r) => r.source)).toEqual(["microphone"]);

    media.stop();
    expect(trackBehind(microphone).stop).toHaveBeenCalled();
@@ -107,7 +107,6 @@ export function createLocalMedia(
    if (source !== "microphone" && source !== "camera") return;
    capturedTracks.get(source)?.stop();
    capturedTracks.delete(source);
-    requests.delete(source);
    publishCapturedTracks();
  };

@@ -184,7 +184,6 @@ export function createRTCParticipation(
          encryptMedia: encryptionSystem.kind !== E2eeType.NONE,
          matrixRTCMode,
          sendNotificationType: options.sendNotificationType,
-          callIntent: options.callIntent,
          applicationData: options.applicationData,
          timings,
          delayedLeave,
@@ -12,7 +12,6 @@ Please see LICENSE in the repository root for full details.
 */

 import {
-  type RTCCallIntent,
  type RTCNotificationType,
  type Transport,
 } from "matrix-js-sdk/lib/matrixrtc";
@@ -104,14 +103,11 @@ export interface RTCParticipationOptions {
   * to a notification (ringing, timeouts, declines) is the application's job.
   */
  sendNotificationType?: RTCNotificationType;
-  /**
-   * The kind of call the local member intends to take part in: `"m.audio"`
-   * or `"m.video"`. Carried by the membership as a field of its own.
-   */
-  callIntent?: RTCCallIntent;
  /**
   * Whatever the application wants to say about itself in the membership,
-   * under namespaced keys. Opaque to the SDK.
+   * under namespaced keys. Opaque to the SDK, apart from `m.call.intent`
+   * (`"audio"` or `"video"`), which the membership format carries as a
+   * field of its own.
   */
  applicationData?: Record<string, unknown>;
  /** Timings the host has configured; the defaults otherwise. */
@@ -291,7 +287,7 @@ export interface RTCMember {
  memberId: string;
  /** Which transport this member is on; undefined when the membership has none. */
  transport$: Behavior<TransportMetadata | undefined>;
-  /** What the member's application says about itself, e.g. `intent`. */
+  /** What the member's application says about itself, e.g. `m.call.intent`. */
  applicationData$: Behavior<Record<string, unknown>>;

  displayName$: Behavior<string>;
@@ -60,7 +60,7 @@ describe("joinJsSdkSession", () => {
    expect(s.join).toHaveBeenCalledWith(ownMemberMock, [transportWithAlias], {
      notificationType: "ring",
      callIntent: undefined,
-      applicationData: undefined,
+      applicationData: {},
      manageMediaKeys: true,
      delayedLeaveEventRestartMs: 300_000,
      delayedLeaveEventDelayMs: 3_600_000,
@@ -95,14 +95,13 @@ describe("joinJsSdkSession", () => {
    );
  });

-  it("passes the call intent and application data through and sends sticky events in Matrix 2.0 mode", () => {
+  it("lifts the call intent out of the application data and sends sticky events in Matrix 2.0 mode", () => {
    const s = session();

    joinJsSdkSession("!room:example.org", s, ownMemberMock, transport, {
      encryptMedia: true,
      matrixRTCMode: MatrixRTCMode.Matrix_2_0,
-      callIntent: "m.audio",
-      applicationData: { custom: 1 },
+      applicationData: { "m.call.intent": "audio", custom: 1 },
      timings: defaultSessionTimings,
      delayedLeave: defaultSessionTimings.delayedLeave,
    });
@@ -111,7 +110,7 @@ describe("joinJsSdkSession", () => {
      ownMemberMock,
      [transportWithAlias],
      expect.objectContaining({
-        callIntent: "m.audio",
+        callIntent: "audio",
        applicationData: { custom: 1 },
        unstableSendStickyEvents: true,
      }),
@@ -125,8 +124,7 @@ describe("joinJsSdkSession", () => {
    joinJsSdkSession("!room:example.org", s, ownMemberMock, transport, {
      encryptMedia: true,
      matrixRTCMode: MatrixRTCMode.Matrix_2_0,
-      callIntent: "m.audio",
-      applicationData: { custom: 1 },
+      applicationData: { "m.call.intent": "audio", custom: 1 },
      timings: defaultSessionTimings,
      delayedLeave: defaultSessionTimings.delayedLeave,
    });
@@ -135,7 +133,7 @@ describe("joinJsSdkSession", () => {
      ownMemberMock,
      [transport],
      expect.objectContaining({
-        callIntent: "m.audio",
+        callIntent: "audio",
        applicationData: { custom: 1 },
        unstableSendStickyEvents: true,
      }),
@@ -23,7 +23,6 @@ interface Options {
  encryptMedia: boolean;
  matrixRTCMode: MatrixRTCMode;
  sendNotificationType?: RTCNotificationType;
-  callIntent?: RTCCallIntent;
  applicationData?: Record<string, unknown>;
  timings: SessionTimings;
  /** The delayed leave timings to use: delegated to the SFU or not. */
@@ -44,12 +43,15 @@ export function joinJsSdkSession(
    encryptMedia,
    matrixRTCMode,
    sendNotificationType,
-    callIntent,
    applicationData,
    timings,
    delayedLeave,
  }: Options,
 ): void {
+  // The membership format carries the intent as a field of its own
+  const { "m.call.intent": intent, ...rest } = applicationData ?? {};
+  const callIntent =
+    typeof intent === "string" ? (intent as RTCCallIntent) : undefined;
  // Give up on the network as soon as either the sync has been down for the
  // grace period or the delayed leave has probably been sent, whichever is
  // sooner
@@ -76,7 +78,7 @@ export function joinJsSdkSession(
    {
      notificationType: sendNotificationType,
      callIntent,
-      applicationData,
+      applicationData: rest,
      manageMediaKeys: encryptMedia,
      delayedLeaveEventRestartMs: delayedLeave.restart_ms,
      delayedLeaveEventDelayMs: delayedLeave.delay_ms,
@@ -225,51 +225,6 @@ describe("createLivekitMediaTrack", () => {
    );
  });

-  // LiveKit's media stream track is the processed one while a processor runs,
-  // and that one names no device; the camera behind it does
-  it.each([
-    { deviceId: "cam-1", switches: false },
-    { deviceId: "cam-2", switches: true },
-  ])(
-    "leaves a processed camera alone unless its device changes: $deviceId",
-    async ({ deviceId, switches }) => {
-      vi.stubGlobal("MediaStreamTrack", class {});
-      onTestFinished(() => {
-        vi.unstubAllGlobals();
-      });
-      const camera = Object.assign(Object.create(LocalVideoTrack.prototype), {
-        source: Track.Source.Camera,
-        _mediaStreamTrack: {
-          readyState: "live",
-          label: "",
-          getSettings: () => ({ deviceId: "cam-1" }),
-        },
-        // What LiveKit shows as the track, with no device of its own
-        processor: {
-          processedTrack: { label: "", getSettings: () => ({}) },
-        },
-      }) as LocalVideoTrack;
-      const switchActiveDevice = vi.fn().mockResolvedValue(true);
-      const { participant, publication, room } = fakes({
-        track: camera as unknown as FakeTrack,
-      });
-      const track = createLocalLivekitMediaTrack(
-        scope,
-        Object.assign(participant, {
-          isLocal: true,
-        }) as unknown as LocalParticipant,
-        publication as unknown as TrackPublication,
-        Object.assign(room, { switchActiveDevice }),
-        vi.fn(),
-      );
-
-      await track.setDevice(deviceId);
-      expect(switchActiveDevice.mock.calls).toEqual(
-        switches ? [["videoinput", deviceId, false]] : [],
-      );
-    },
-  );
-
  // LiveKit stops a camera that is turned off; the processor is built when it
  // is turned on again
  it.each([
@@ -199,13 +199,11 @@ export function createLocalLivekitMediaTrack(
        throw new MatrixRTCError(`A ${base.source} track has no device`);
      // LiveKit decides whether to restart by the constraints it keeps, which
      // a browser that does not echo the device id back (Firefox) leaves
-      // without one; a track already on the device is left alone here. Asked
-      // of the camera track itself: with a processor on, LiveKit's media
-      // stream track is the processed one, which names no device
+      // without one; a track already on the device is left alone here
      const current = publication.track;
      if (
        current instanceof LocalTrack &&
-        (await current.getDeviceId(false)) === deviceId
+        current.mediaStreamTrack.getSettings().deviceId === deviceId
      )
        return;
      await room.switchActiveDevice(
@@ -18,8 +18,6 @@ Please see LICENSE in the repository root for full details.
 */

 import {
-  RTC_CALL_INTENT_AUDIO,
-  RTC_CALL_INTENT_VIDEO,
  type RTCCallIntent,
  type RTCNotificationType,
 } from "matrix-js-sdk/lib/matrixrtc";
@@ -181,40 +179,40 @@ export function configurationForIntent(intent: UserIntent): UrlConfiguration {
  switch (intent) {
    case UserIntent.StartNewCall:
      preset.skipLobby = false;
-      preset.callIntent = RTC_CALL_INTENT_VIDEO;
+      preset.callIntent = "video";
      break;
    case UserIntent.JoinExistingCall:
      // On desktop this will be overridden based on which button was used to join the call
      preset.skipLobby = false;
-      preset.callIntent = RTC_CALL_INTENT_VIDEO;
+      preset.callIntent = "video";
      break;
    case UserIntent.StartNewCallVoice:
      preset.skipLobby = false;
-      preset.callIntent = RTC_CALL_INTENT_AUDIO;
+      preset.callIntent = "audio";
      break;
    case UserIntent.JoinExistingCallVoice:
      // On desktop this will be overridden based on which button was used to join the call
      preset.skipLobby = false;
-      preset.callIntent = RTC_CALL_INTENT_AUDIO;
+      preset.callIntent = "audio";
      break;
    case UserIntent.StartNewCallDMVoice:
-      preset.callIntent = RTC_CALL_INTENT_AUDIO;
+      preset.callIntent = "audio";
    // Fall through
    case UserIntent.StartNewCallDM:
      preset.skipLobby = true;
      preset.sendNotificationType = "ring";
      preset.autoLeaveWhenOthersLeft = true;
      preset.waitForCallPickup = true;
-      preset.callIntent = preset.callIntent ?? RTC_CALL_INTENT_VIDEO;
+      preset.callIntent = preset.callIntent ?? "video";
      break;
    case UserIntent.JoinExistingCallDMVoice:
-      preset.callIntent = RTC_CALL_INTENT_AUDIO;
+      preset.callIntent = "audio";
    // Fall through
    case UserIntent.JoinExistingCallDM:
      // On desktop this will be overridden based on which button was used to join the call
      preset.skipLobby = true;
      preset.autoLeaveWhenOthersLeft = true;
-      preset.callIntent = preset.callIntent ?? RTC_CALL_INTENT_VIDEO;
+      preset.callIntent = preset.callIntent ?? "video";
      break;
    // Non widget usecase defaults
    default:
@@ -21,10 +21,6 @@ import {
  UserIntent,
 } from "../src/UrlParams";
 import { mockConfig } from "./utils/test";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  RTC_CALL_INTENT_VIDEO,
-} from "matrix-js-sdk/lib/matrixrtc";

 const ROOM_NAME = "roomNameHere";
 const ROOM_ID = "!d45f138fsd";
@@ -279,7 +275,7 @@ describe("UrlParams", () => {
      ).toMatchObject({
        ...startNewCallDefaults("desktop"),
        skipLobby: false,
-        callIntent: RTC_CALL_INTENT_VIDEO,
+        callIntent: "video",
      });
    });

@@ -326,7 +322,7 @@ describe("UrlParams", () => {
      ).toMatchObject({
        ...startNewCallDefaults("desktop"),
        skipLobby: false,
-        callIntent: RTC_CALL_INTENT_AUDIO,
+        callIntent: "audio",
      });
    });

@@ -337,7 +333,7 @@ describe("UrlParams", () => {
        ),
      ).toMatchObject({
        ...joinExistingCallDefaults("desktop"),
-        callIntent: RTC_CALL_INTENT_AUDIO,
+        callIntent: "audio",
      });
    });

@@ -352,7 +348,7 @@ describe("UrlParams", () => {
        sendNotificationType: "ring",
        autoLeaveWhenOthersLeft: true,
        waitForCallPickup: true,
-        callIntent: RTC_CALL_INTENT_AUDIO,
+        callIntent: "audio",
      });
    });

@@ -367,7 +363,7 @@ describe("UrlParams", () => {
        skipLobby: true,
        autoLeaveWhenOthersLeft: true,
        waitForCallPickup: false,
-        callIntent: RTC_CALL_INTENT_VIDEO,
+        callIntent: "video",
      });
    });

@@ -381,7 +377,7 @@ describe("UrlParams", () => {
        skipLobby: true,
        autoLeaveWhenOthersLeft: true,
        waitForCallPickup: false,
-        callIntent: RTC_CALL_INTENT_AUDIO,
+        callIntent: "audio",
      });
    });
  });
@@ -35,7 +35,7 @@ import { LayoutSwitch } from "../room/LayoutSwitch";
 import { type BackgroundEffectGridItem } from "./BackgroundEffectGrid";
 import { SelfPreview } from "./SelfPreview";
 import { type UnusableReason } from "../tracks/backgroundImages";
-import { type LocalVideoMediaTrack } from "@element-hq/matrixrtc-sdk";
+import { type ShownCamera } from "../tracks/cameraTrack";

 export interface BackgroundImageRefusal {
  reason: UnusableReason | "not-kept";
@@ -95,7 +95,7 @@ export interface FooterState {
  /** Why the last file offered couldn't be kept, if it couldn't. */
  backgroundImageRefusal: BackgroundImageRefusal | undefined;
  /** The camera to preview, with the effect in force; null while it is off. */
-  cameraTrack: LocalVideoMediaTrack | null;
+  cameraTrack: ShownCamera | null;
  showFooter: boolean;

  /* This is needed for WindowMode = "flat" */
@@ -7,17 +7,14 @@ Please see LICENSE in the repository root for full details.

 import { afterEach, describe, expect, it, vi } from "vitest";
 import { BehaviorSubject } from "rxjs";
-import { type LocalVideoMediaTrack } from "@element-hq/matrixrtc-sdk";

 import {
  flushPromises,
  testScope,
  mockMuteStates,
  mockMediaDevices,
-  mockVideoTrack,
 } from "../utils/test";
-import { type Behavior, constant } from "../state/Behavior";
-import { type BackgroundEffectsState } from "../state/BackgroundEffects";
+import { constant } from "../state/Behavior";
 import type { CallViewModel } from "../state/CallViewModel/CallViewModel";
 import type { Layout } from "../state/layout-types";
 import type { SpotlightTileViewModel } from "../state/TileViewModel";
@@ -27,6 +24,9 @@ import {
  createLobbyFooterViewModel,
 } from "./CallFooterViewModel";
 import { HeaderStyle } from "../UrlParams";
+import { type BackgroundEffectsState } from "../state/BackgroundEffects";
+import { type ShownCamera, SyncedCameraTrack } from "../tracks/cameraTrack";
+import { type MuteStates } from "../state/MuteStates";
 import { backgroundEffect as backgroundEffectSetting } from "../settings/settings";
 import { shippedBackgrounds } from "../tracks/backgroundEffectCatalog";
 import type * as BackgroundImages from "../tracks/backgroundImages";
@@ -81,7 +81,6 @@ vi.mock("livekit-client", () => ({
 function buildMinimalCallViewModel(layout: Layout): CallViewModel {
  return {
    layout$: constant(layout),
-    camera$: constant(undefined),
    edgeToEdge$: constant(false),
    showHeader$: constant(false),
    hangup: (): void => {},
@@ -118,11 +117,6 @@ const noPipeline = constant<BackgroundEffectsState>({
  processor: undefined,
 });

-/** The provider's verdict, which the SDK's check stands for here. */
-function pipelineAsTheSdkSays(): Behavior<BackgroundEffectsState> {
-  return constant({ supported: sdkSupportMock(), processor: undefined });
-}
-
 const twoMicsAndOneCamMediaDevices = mockMediaDevices({
  audioInput: {
    available$: constant(
@@ -285,8 +279,7 @@ describe("createCallFooterViewModel", () => {
        testScope(),
        mockMuteStates(),
        twoMicsAndOneCamMediaDevices,
-        pipelineAsTheSdkSays(),
-        /* camera$ */ constant(null),
+        noPipeline,
        /* openSettings */ undefined,
        /* hangup */ undefined,
        /* showLogo */ false,
@@ -374,49 +367,22 @@ describe("createCallFooterViewModel", () => {
      const pipeline$ = new BehaviorSubject<BackgroundEffectsState>({
        supported: true,
        processor: undefined,
-        wait: "settling",
+        settling: true,
      });
      const vm = createLobbyFooterViewModel(
        testScope(),
        mockMuteStates(),
        twoMicsAndOneCamMediaDevices,
        pipeline$,
-        /* camera$ */ constant(null),
        /* openSettings */ undefined,
        /* hangup */ undefined,
        /* showLogo */ false,
      );
      expect(vm.backgroundEffectSettling$.value).toBe(true);
-      pipeline$.next({ ...pipeline$.value, wait: undefined });
+      pipeline$.next({ ...pipeline$.value, settling: false });
      expect(vm.backgroundEffectSettling$.value).toBe(false);
    });

-    it("offers nothing once the pipeline fails to build, keeping the choice", () => {
-      platformMock.mockReturnValue("desktop");
-      backgroundEffectSetting.setValue("blur");
-      const pipeline$ = new BehaviorSubject<BackgroundEffectsState>({
-        supported: true,
-        processor: undefined,
-      });
-      const vm = createLobbyFooterViewModel(
-        testScope(),
-        mockMuteStates(),
-        twoMicsAndOneCamMediaDevices,
-        pipeline$,
-        /* camera$ */ constant(null),
-        /* openSettings */ undefined,
-        /* hangup */ undefined,
-        /* showLogo */ false,
-      );
-      expect(vm.backgroundEffect$.value).toBe("blur");
-
-      pipeline$.next({ supported: false, processor: undefined });
-      expect(vm.selectBackgroundEffect$.value).toBeUndefined();
-      expect(vm.addBackgroundImage$.value).toBeUndefined();
-      expect(vm.backgroundEffect$.value).toBe("none");
-      expect(backgroundEffectSetting.getValue()).toBe("blur");
-    });
-
    it("adding is unavailable at the limit", () => {
      sdkSupportMock.mockReturnValue(true);
      const added$ = addedBackgrounds.added$ as BehaviorSubject<
@@ -473,44 +439,33 @@ describe("createCallFooterViewModel", () => {
      expect(store.remove).toHaveBeenCalledWith("spare");
    });

-    it("previews the lobby's camera while there is one", () => {
-      const track = mockVideoTrack({});
-      const camera$ = new BehaviorSubject<LocalVideoMediaTrack | null>(track);
+    it("previews the camera only while it is on", () => {
+      const camera = new SyncedCameraTrack();
+      const track = {} as ShownCamera;
+      camera.report(track);
+      const videoEnabled$ = new BehaviorSubject(true);
+      const muteStates = mockMuteStates();
      const vm = createLobbyFooterViewModel(
        testScope(),
-        mockMuteStates(),
+        {
+          ...muteStates,
+          video: { ...muteStates.video, enabled$: videoEnabled$ },
+        } as unknown as MuteStates,
        twoMicsAndOneCamMediaDevices,
-        noPipeline,
-        camera$,
+        constant({
+          supported: true,
+          processor: undefined,
+          cameraTrack: camera,
+        }),
        /* openSettings */ undefined,
        /* hangup */ undefined,
        /* showLogo */ false,
      );
      expect(vm.cameraTrack$.value).toBe(track);
-      // The lobby releases the camera when it is turned off
-      camera$.next(null);
+      videoEnabled$.next(false);
      expect(vm.cameraTrack$.value).toBeNull();
    });

-    it("previews the call's camera only while it is not muted", () => {
-      const muted$ = new BehaviorSubject(false);
-      const track = mockVideoTrack({ muted$ });
-      const vm = createCallFooterViewModel(
-        testScope(),
-        { ...buildMinimalCallViewModel(gridLayout), camera$: constant(track) },
-        mockMuteStates(),
-        twoMicsAndOneCamMediaDevices,
-        noPipeline,
-        /* reactionIdentifier */ undefined,
-        { showControls: true, header: HeaderStyle.Standard },
-      );
-      expect(vm.cameraTrack$.value).toBe(track);
-      muted$.next(true);
-      expect(vm.cameraTrack$.value).toBeNull();
-      muted$.next(false);
-      expect(vm.cameraTrack$.value).toBe(track);
-    });
-
    it("availability is the same before and during a call", () => {
      for (const supported of [true, false]) {
        sdkSupportMock.mockReturnValue(supported);
@@ -520,7 +475,7 @@ describe("createCallFooterViewModel", () => {
          buildMinimalCallViewModel(gridLayout),
          mockMuteStates(),
          twoMicsAndOneCamMediaDevices,
-          pipelineAsTheSdkSays(),
+          noPipeline,
          /* reactionIdentifier */ undefined,
          { showControls: true, header: HeaderStyle.Standard },
        );
@@ -15,8 +15,10 @@ import {
  switchMap,
 } from "rxjs";
 import { supportsAudioOutputSelection } from "livekit-client";
-import { type LocalVideoMediaTrack } from "@element-hq/matrixrtc-sdk";
-import { supportsModernBackgroundProcessors } from "@livekit/track-processors";
+import {
+  supportsBackgroundProcessors,
+  supportsModernBackgroundProcessors,
+} from "@livekit/track-processors";
 import { logger } from "matrix-js-sdk/lib/logger";

 import {
@@ -24,6 +26,7 @@ import {
  serializeEffect,
  shippedBackgrounds,
 } from "../tracks/backgroundEffectCatalog";
+import { type BackgroundEffectsState } from "../state/BackgroundEffects";
 import {
  type AddedBackground,
  addedBackgrounds,
@@ -32,7 +35,6 @@ import {
 } from "../tracks/backgroundImages";

 import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
-import { type BackgroundEffectsState } from "../state/BackgroundEffects";
 import { type MenuOptions } from "./MediaMuteAndSwitchButton";
 import { type MediaDevices } from "../state/MediaDevices";
 import {
@@ -88,8 +90,7 @@ function buildDeviceBehaviors(
  /** return empty arrays for  audioOptions and videoOptions*/
  disableSwitcher$: Behavior<boolean>,
  backgroundEffectsState$: Observable<BackgroundEffectsState>,
-  /** The camera as the pipeline has it, for the menu's preview. */
-  camera$: Observable<LocalVideoMediaTrack | null | undefined>,
+  videoEnabled$: Behavior<boolean>,
 ): Pick<
  ViewModel<FooterSnapshot>,
  | "audioOptions$"
@@ -126,14 +127,10 @@ function buildDeviceBehaviors(
      ),
    );

-  // Also false once the pipeline has failed to build this session.
-  const supported$ = backgroundEffectsState$.pipe(
-    map(({ supported }) => supported === true),
-    distinctUntilChanged(),
-  );
+  const supported = supportsBackgroundProcessors();
  const slow = !supportsModernBackgroundProcessors();
-  const offered$ = combineLatest([disableSwitcher$, supported$]).pipe(
-    map(([switcherDisabled, supported]) => !switcherDisabled && supported),
+  const offered$ = disableSwitcher$.pipe(
+    map((switcherDisabled) => !switcherDisabled && supported),
  );
  // A new object for each refusal, so the same one twice is shown twice.
  const refusal$ = new BehaviorSubject<BackgroundImageRefusal | undefined>(
@@ -164,10 +161,8 @@ function buildDeviceBehaviors(
    ),
    selectVideoButtonOption$: constant(mediaDevices.videoInput.select),
    backgroundEffect$: scope.behavior(
-      combineLatest([backgroundEffectSetting.value$, supported$]).pipe(
-        map(([raw, supported]) =>
-          supported ? serializeEffect(parseEffect(raw)) : "none",
-        ),
+      backgroundEffectSetting.value$.pipe(
+        map((raw) => (supported ? serializeEffect(parseEffect(raw)) : "none")),
      ),
    ),
    selectBackgroundEffect$: scope.behavior(
@@ -196,7 +191,7 @@ function buildDeviceBehaviors(
    ),
    backgroundEffectSettling$: scope.behavior(
      backgroundEffectsState$.pipe(
-        map(({ wait }) => wait !== undefined),
+        map(({ settling }) => settling ?? false),
        distinctUntilChanged(),
      ),
      false,
@@ -220,15 +215,13 @@ function buildDeviceBehaviors(
      ),
    ),
    backgroundImageRefusal$: refusal$,
-    // None while muted: the call mutes its track rather than releasing it.
    cameraTrack$: scope.behavior(
-      camera$.pipe(
-        switchMap((camera) =>
-          camera
-            ? camera.muted$.pipe(map((muted) => (muted ? null : camera)))
-            : of(null),
+      combineLatest([
+        backgroundEffectsState$.pipe(
+          switchMap(({ cameraTrack }) => cameraTrack?.track$ ?? of(null)),
        ),
-      ),
+        videoEnabled$,
+      ]).pipe(map(([track, videoEnabled]) => (videoEnabled ? track : null))),
      null,
    ),
    // Never the one in force: taking it away would leave nothing chosen.
@@ -260,8 +253,8 @@ function buildDeviceBehaviors(
 * @param callModel - The root CallViewModel; provides layout, grid mode, reactions, etc.
 * @param muteStates - Audio and video mute state + toggles.
 * @param mediaDevices - Available and selected input devices.
- * @param backgroundEffectsState$ - The background pipeline's state: whether
- *   effects run here, and the wait for the first.
+ * @param backgroundEffectsState$ - The background pipeline's state: whether effects
+ *   run here, the wait for the first, and the camera it is synced to.
 * @param reactionIdentifier - The local user's reaction identifier string, or
 *   undefined when reactions are not supported (hides the reaction button).
 * @param options - `showControls`: whether the call controls should be shown.
@@ -292,7 +285,7 @@ export function createCallFooterViewModel(
      mediaDevices,
      disableDeviceSwitcher$,
      backgroundEffectsState$,
-      callModel.camera$,
+      muteStates.video.enabled$,
    ),
    // candidat to move into the FooterViewModel
    showFooter$: callModel.showFooter$,
@@ -355,9 +348,8 @@ export function createCallFooterViewModel(
 * @param scope - ObservableScope that bounds the lifetime of derived behaviors.
 * @param muteStates - Audio and video mute state + toggles.
 * @param mediaDevices - Available and selected input devices.
- * @param backgroundEffectsState$ - The background pipeline's state: whether
- *   effects run here, and the wait for the first.
- * @param camera$ - The lobby's camera, for the camera menu's preview.
+ * @param backgroundEffectsState$ - The background pipeline's state: whether effects
+ *   run here, the wait for the first, and the camera it is synced to.
 * @param openSettings - Callback to open the settings modal, or undefined.
 * @param hangup - Callback to leave/cancel, or undefined (hides the button).
 * @param showLogo - Whether to show the Element Call logo.
@@ -367,7 +359,6 @@ export function createLobbyFooterViewModel(
  muteStates: MuteStates,
  mediaDevices: MediaDevices,
  backgroundEffectsState$: Observable<BackgroundEffectsState>,
-  camera$: Behavior<LocalVideoMediaTrack | null>,
  openSettings: (() => void) | undefined,
  hangup: (() => void) | undefined,
  showLogo: boolean,
@@ -416,7 +407,7 @@ export function createLobbyFooterViewModel(
      mediaDevices,
      constant(false),
      backgroundEffectsState$,
-      camera$,
+      muteStates.video.enabled$,
    ),
  };
 }
@@ -114,9 +114,6 @@ const MENU_WIDTH = 296;
 /** Space kept between the menu and the call area's sides. */
 const MENU_MARGIN = 16;

-/** Below the preview, as its stylesheet draws it. */
-const PREVIEW_GAP = 12;
-
 export const MediaMuteAndSwitchButton: FC<MediaMuteAndSwitchButtonProps> = ({
  enabled,
  busy,
@@ -218,6 +215,12 @@ export const MediaMuteAndSwitchButton: FC<MediaMuteAndSwitchButtonProps> = ({
  const [previewBlock, setPreviewBlock] = useState(0);
  useEffect(() => {
    if (!menuOpen) return;
+    // From the tokens the stylesheets size the preview with, so that it is
+    // placed once rather than measured and moved.
+    const tokens = getComputedStyle(rootElement);
+    const px = (token: string): number =>
+      parseFloat(tokens.getPropertyValue(token)) || 0;
+    const below = px("--cpd-space-2x") + px("--cpd-space-1x");
    // Followed, since a host can resize the call while the menu is open.
    const subscription = observeElementSize$(rootElement)
      .pipe(
@@ -231,7 +234,7 @@ export const MediaMuteAndSwitchButton: FC<MediaMuteAndSwitchButtonProps> = ({
      )
      .subscribe(({ height, width }) => {
        setListShare(height);
-        setPreviewBlock(Math.round((width * 9) / 16) + PREVIEW_GAP);
+        setPreviewBlock(Math.round((width * 9) / 16) + below);
      });
    return (): void => subscription.unsubscribe();
  }, [menuOpen, rootElement]);
@@ -1,47 +0,0 @@
-/*
-Copyright 2026 Element Creations Ltd.
-
-SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
-Please see LICENSE in the repository root for full details.
-*/
-
-import { act, render } from "@testing-library/react";
-import { describe, expect, it } from "vitest";
-import { BehaviorSubject } from "rxjs";
-
-import { SelfPreview } from "./SelfPreview";
-import styles from "./SelfPreview.module.css";
-import { mockVideoTrack } from "../utils/test";
-
-describe("SelfPreview", () => {
-  it("detaches only its own element from a camera shown twice", () => {
-    const track = mockVideoTrack({});
-    const first = render(<SelfPreview track={track} />);
-    const second = render(<SelfPreview track={track} />);
-    const [a, b] = [first, second].map((r) =>
-      r.container.querySelector("video"),
-    );
-    expect(track.attach).toHaveBeenCalledWith(a);
-    expect(track.attach).toHaveBeenCalledWith(b);
-
-    first.unmount();
-    expect(track.detach).toHaveBeenCalledExactlyOnceWith(a);
-  });
-
-  it("mirrors the camera while it faces the user, and only then", () => {
-    const facingMode$ = new BehaviorSubject<"user" | "environment">("user");
-    const { container } = render(
-      <SelfPreview track={mockVideoTrack({ facingMode$ })} />,
-    );
-    const video = (): HTMLVideoElement => container.querySelector("video")!;
-    expect(video().classList.contains(styles.mirrored)).toBe(true);
-    act(() => facingMode$.next("environment"));
-    expect(video().classList.contains(styles.mirrored)).toBe(false);
-  });
-
-  it("says the camera is off while there is none", () => {
-    const { container } = render(<SelfPreview track={null} />);
-    expect(container.querySelector("video")).toBeNull();
-    expect(container.querySelector("svg")).not.toBeNull();
-  });
-});
@@ -5,18 +5,16 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */

-import { type FC, useEffect, useRef } from "react";
-import { constant, type LocalVideoMediaTrack } from "@element-hq/matrixrtc-sdk";
+import { type FC } from "react";
 import { VideoCallOffIcon } from "@vector-im/compound-design-tokens/assets/web/icons";

 import styles from "./SelfPreview.module.css";
-import { useBehavior } from "../useBehavior";
-
-const noFacingMode = constant(undefined);
+import { useAttachedTrack } from "../useAttachedTrack";
+import { type ShownCamera } from "../tracks/cameraTrack";

 interface Props {
  /** The camera as the pipeline has it, or none while the camera is off. */
-  track: LocalVideoMediaTrack | null;
+  track: ShownCamera | null;
 }

 /**
@@ -24,17 +22,7 @@ interface Props {
 * shown a second time rather than captured again.
 */
 export const SelfPreview: FC<Props> = ({ track }) => {
-  const videoRef = useRef<HTMLVideoElement | null>(null);
-  useEffect(() => {
-    const element = videoRef.current;
-    if (!track || !element) return;
-    track.attach(element);
-    // This element only: the pre-join preview may be showing the same camera
-    return (): void => {
-      track.detach(element);
-    };
-  }, [track]);
-  const facingMode = useBehavior(track?.facingMode$ ?? noFacingMode);
+  const { videoRef, mirrored } = useAttachedTrack(track);

  if (!track) return <VideoCallOffIcon width={32} height={32} />;
  return (
@@ -42,7 +30,7 @@ export const SelfPreview: FC<Props> = ({ track }) => {
      ref={videoRef}
      muted
      playsInline
-      className={facingMode === "user" ? styles.mirrored : undefined}
+      className={mirrored ? styles.mirrored : undefined}
    />
  );
 };
@@ -108,22 +108,6 @@ describe("Config.initWith", () => {
    expect(Config.get().media_quality).toEqual(DEFAULT_CONFIG.media_quality);
  });

-  it("falls back to the defaults when config.json is not JSON", async () => {
-    vi.spyOn(globalThis, "fetch").mockResolvedValue(
-      new Response("<!doctype html><title>Element</title>", {
-        status: 200,
-        headers: { "content-type": "text/html" },
-      }),
-    );
-    const warnSpy = vi.spyOn(logger, "warn").mockImplementation(() => {});
-    Reflect.set(Config, "internalInstance", undefined);
-
-    await expect(Config.init()).resolves.toBeUndefined();
-
-    expect(Config.get().media_quality).toEqual(DEFAULT_CONFIG.media_quality);
-    expect(warnSpy).toHaveBeenCalledTimes(1);
-  });
-
  it("replaces a config initialized earlier", () => {
    Config.initWith({ ssla: "https://first.invalid/ssla" });
    Config.initWith({ ssla: "https://second.invalid/ssla" });
@@ -156,10 +156,5 @@ async function downloadConfig(fetchTarget: string): Promise<ConfigOptions> {
    return {};
  }

-  try {
-    return await response.json();
-  } catch (e) {
-    logger.warn(`Config at ${fetchTarget} is not JSON, using defaults`, e);
-    return {};
-  }
+  return response.json();
 }
@@ -7,30 +7,30 @@ Please see LICENSE in the repository root for full details.

 import { type RelationType } from "matrix-js-sdk";

-import catSoundOgg from "../sound/reactions/cat.ogg?url&no-inline";
-import catSoundMp3 from "../sound/reactions/cat.mp3?url&no-inline";
-import clapSoundOgg from "../sound/reactions/clap.ogg?url&no-inline";
-import clapSoundMp3 from "../sound/reactions/clap.mp3?url&no-inline";
-import cricketsSoundOgg from "../sound/reactions/crickets.ogg?url&no-inline";
-import cricketsSoundMp3 from "../sound/reactions/crickets.mp3?url&no-inline";
-import dogSoundOgg from "../sound/reactions/dog.ogg?url&no-inline";
-import dogSoundMp3 from "../sound/reactions/dog.mp3?url&no-inline";
-import genericSoundOgg from "../sound/reactions/generic.ogg?url&no-inline";
-import genericSoundMp3 from "../sound/reactions/generic.mp3?url&no-inline";
-import lightbulbSoundOgg from "../sound/reactions/lightbulb.ogg?url&no-inline";
-import lightbulbSoundMp3 from "../sound/reactions/lightbulb.mp3?url&no-inline";
-import partySoundOgg from "../sound/reactions/party.ogg?url&no-inline";
-import partySoundMp3 from "../sound/reactions/party.mp3?url&no-inline";
-import deerSoundOgg from "../sound/reactions/deer.ogg?url&no-inline";
-import deerSoundMp3 from "../sound/reactions/deer.mp3?url&no-inline";
-import rockSoundOgg from "../sound/reactions/rock.ogg?url&no-inline";
-import rockSoundMp3 from "../sound/reactions/rock.mp3?url&no-inline";
-import waveSoundOgg from "../sound/reactions/wave.ogg?url&no-inline";
-import waveSoundMp3 from "../sound/reactions/wave.mp3?url&no-inline";
-import baduntssSoundOgg from "../sound/reactions/baduntss.ogg?url&no-inline";
-import baduntssSoundMp3 from "../sound/reactions/baduntss.mp3?url&no-inline";
-import bellSoundOgg from "../sound/reactions/bell.ogg?url&no-inline";
-import bellSoundMp3 from "../sound/reactions/bell.mp3?url&no-inline";
+import catSoundOgg from "../sound/reactions/cat.ogg?url";
+import catSoundMp3 from "../sound/reactions/cat.mp3?url";
+import clapSoundOgg from "../sound/reactions/clap.ogg?url";
+import clapSoundMp3 from "../sound/reactions/clap.mp3?url";
+import cricketsSoundOgg from "../sound/reactions/crickets.ogg?url";
+import cricketsSoundMp3 from "../sound/reactions/crickets.mp3?url";
+import dogSoundOgg from "../sound/reactions/dog.ogg?url";
+import dogSoundMp3 from "../sound/reactions/dog.mp3?url";
+import genericSoundOgg from "../sound/reactions/generic.ogg?url";
+import genericSoundMp3 from "../sound/reactions/generic.mp3?url";
+import lightbulbSoundOgg from "../sound/reactions/lightbulb.ogg?url";
+import lightbulbSoundMp3 from "../sound/reactions/lightbulb.mp3?url";
+import partySoundOgg from "../sound/reactions/party.ogg?url";
+import partySoundMp3 from "../sound/reactions/party.mp3?url";
+import deerSoundOgg from "../sound/reactions/deer.ogg?url";
+import deerSoundMp3 from "../sound/reactions/deer.mp3?url";
+import rockSoundOgg from "../sound/reactions/rock.ogg?url";
+import rockSoundMp3 from "../sound/reactions/rock.mp3?url";
+import waveSoundOgg from "../sound/reactions/wave.ogg?url";
+import waveSoundMp3 from "../sound/reactions/wave.mp3?url";
+import baduntssSoundOgg from "../sound/reactions/baduntss.ogg?url";
+import baduntssSoundMp3 from "../sound/reactions/baduntss.mp3?url";
+import bellSoundOgg from "../sound/reactions/bell.ogg?url";
+import bellSoundMp3 from "../sound/reactions/bell.mp3?url";

 export const ElementCallReactionEventType = "io.element.call.reaction";

@@ -8,18 +8,18 @@ Please see LICENSE in the repository root for full details.
 import { type ReactNode, useEffect } from "react";

 import { type CallViewModel } from "../state/CallViewModel/CallViewModel";
-import joinCallSoundMp3 from "../sound/join_call.mp3?url&no-inline";
-import joinCallSoundOgg from "../sound/join_call.ogg?url&no-inline";
-import leftCallSoundMp3 from "../sound/left_call.mp3?url&no-inline";
-import leftCallSoundOgg from "../sound/left_call.ogg?url&no-inline";
-import handSoundOgg from "../sound/raise_hand.ogg?url&no-inline";
-import handSoundMp3 from "../sound/raise_hand.mp3?url&no-inline";
-import screenShareStartedOgg from "../sound/screen_share_started.ogg?url&no-inline";
-import screenShareStartedMp3 from "../sound/screen_share_started.mp3?url&no-inline";
-import declineMp3 from "../sound/call_declined.mp3?url&no-inline";
-import declineOgg from "../sound/call_declined.ogg?url&no-inline";
-import timeoutMp3 from "../sound/call_timeout.mp3?url&no-inline";
-import timeoutOgg from "../sound/call_timeout.ogg?url&no-inline";
+import joinCallSoundMp3 from "../sound/join_call.mp3";
+import joinCallSoundOgg from "../sound/join_call.ogg";
+import leftCallSoundMp3 from "../sound/left_call.mp3";
+import leftCallSoundOgg from "../sound/left_call.ogg";
+import handSoundOgg from "../sound/raise_hand.ogg";
+import handSoundMp3 from "../sound/raise_hand.mp3";
+import screenShareStartedOgg from "../sound/screen_share_started.ogg";
+import screenShareStartedMp3 from "../sound/screen_share_started.mp3";
+import declineMp3 from "../sound/call_declined.mp3?url";
+import declineOgg from "../sound/call_declined.ogg?url";
+import timeoutMp3 from "../sound/call_timeout.mp3?url";
+import timeoutOgg from "../sound/call_timeout.ogg?url";
 import { useAudioContext } from "../useAudioContext";
 import { prefetchSounds } from "../soundUtils";
 import { useLatest } from "../useLatest";
@@ -75,6 +75,7 @@ import {
  type RTCSlotOptions,
  constant,
 } from "@element-hq/matrixrtc-sdk";
+import { map } from "rxjs";
 import {
  advancedCamera,
  advancedScreenShare,
@@ -109,7 +110,11 @@ import { useBehavior } from "../useBehavior.ts";
 import { useValueBehavior } from "../useValueBehavior.ts";
 import { Toast } from "../Toast.tsx";
 import overlayStyles from "../Overlay.module.css";
-import { useBackgroundEffectsState$ } from "../tracks/BackgroundEffectsContext";
+import {
+  reportCamera,
+  useBackgroundEffectsState$,
+} from "../tracks/BackgroundEffectsContext.tsx";
+import { sdkCamera } from "../tracks/cameraTrack.ts";
 import { type Layout } from "../state/layout-types.ts";
 import { ObservableScope } from "../state/ObservableScope.ts";
 import { CallFooter, type FooterSnapshot } from "../components/CallFooter.tsx";
@@ -180,7 +185,7 @@ export const ActiveCall: FC<ActiveCallProps> = (props) => {
              props.muteStates,
              mediaDevices,
              capture,
-              backgroundEffectsState$.value,
+              backgroundEffectsState$.value.processor,
            ),
    });

@@ -194,7 +199,9 @@ export const ActiveCall: FC<ActiveCallProps> = (props) => {
        ...callViewModelOptionsFromParams(urlParams),
        encryptionSystem: props.e2eeSystem,
        capture,
-        backgroundEffectsState$,
+        videoProcessor$: scope.behavior(
+          backgroundEffectsState$.pipe(map((state) => state.processor)),
+        ),
        hostBridge,
        autoLeaveWhenOthersLeft,
        waitForCallPickup: waitForCallPickup && sendNotificationType === "ring",
@@ -208,6 +215,12 @@ export const ActiveCall: FC<ActiveCallProps> = (props) => {
      reactionsReader.reactions$,
    );
    setVm(vm);
+    // The call's camera is the one the camera menu shows from here on.
+    reportCamera(
+      scope,
+      vm.camera$.pipe(map((camera) => (camera ? sdkCamera(camera) : null))),
+      backgroundEffectsState$,
+    );

    vm.leave$.pipe(scope.bind()).subscribe(props.onLeft);

@@ -822,7 +835,9 @@ export function rtcParticipationOptions(
  const session = config.matrix_rtc_session;
  return {
    sendNotificationType: urlParams.sendNotificationType,
-    callIntent: urlParams.callIntent,
+    applicationData: urlParams.callIntent
+      ? { "m.call.intent": urlParams.callIntent }
+      : undefined,
    timings: {
      syncDisconnectGracePeriodMs: config.sync_disconnect_grace_period_ms,
      networkErrorRetryMs: session.network_error_retry_ms,
@@ -28,6 +28,7 @@ const stable = vi.hoisted(() => ({
  media: undefined as unknown,
 }));
 vi.mock("../tracks/BackgroundEffectsContext", () => ({
+  reportCamera: (): void => {},
  useBackgroundEffectsState$: (): Behavior<BackgroundEffectsState> =>
    (stable.processorState$ ??= constant({
      supported: false,
@@ -45,6 +45,7 @@ const leaveToHome = vi.fn();
 // One instance: the view keys an effect on it
 const processorState$ = vi.hoisted(() => ({ current: undefined as unknown }));
 vi.mock("../tracks/BackgroundEffectsContext", () => ({
+  reportCamera: (): void => {},
  useBackgroundEffectsState$: (): Behavior<BackgroundEffectsState> =>
    (processorState$.current ??= constant({
      supported: false,
@@ -16,6 +16,7 @@ import {
  type LocalMedia,
  type LocalVideoMediaTrack,
 } from "@element-hq/matrixrtc-sdk";
+import { map } from "rxjs";

 import inCallStyles from "./InCallView.module.css";
 import styles from "./LobbyView.module.css";
@@ -30,7 +31,11 @@ import { LeaveToHomeLink } from "../button/LeaveToHomeLink";
 import { useLeaveToHome } from "../LeaveToHomeContext";
 import { useMediaDevices } from "../MediaDevicesContext";
 import { ObservableScope } from "../state/ObservableScope";
-import { useBackgroundEffectsState$ } from "../tracks/BackgroundEffectsContext";
+import {
+  reportCamera,
+  useBackgroundEffectsState$,
+} from "../tracks/BackgroundEffectsContext";
+import { sdkCamera } from "../tracks/cameraTrack";
 import { useBehavior } from "../useBehavior";
 import { CallFooter, type FooterSnapshot } from "../components/CallFooter";
 import { useCallViewKeyboardShortcuts } from "../useCallViewKeyboardShortcuts";
@@ -126,16 +131,23 @@ export const LobbyView: FC<Props> = ({
  const [mediaVm, setMediaVm] = useState<LobbyMediaViewModel | null>(null);
  useEffect(() => {
    const mediaScope = new ObservableScope();
-    setMediaVm(
-      createLobbyMediaViewModel(
-        mediaScope,
-        media,
-        muteStates,
-        devices,
-        captureSettings(),
-        backgroundEffectsState$,
+    const vm = createLobbyMediaViewModel(
+      mediaScope,
+      media,
+      muteStates,
+      devices,
+      captureSettings(),
+      mediaScope.behavior(
+        backgroundEffectsState$.pipe(map((state) => state.processor)),
      ),
    );
+    // The lobby's camera is the one the camera menu shows until the call's
+    reportCamera(
+      mediaScope,
+      vm.videoTrack$.pipe(map((camera) => camera && sdkCamera(camera))),
+      backgroundEffectsState$,
+    );
+    setMediaVm(vm);
    return (): void => {
      mediaScope.end();
    };
@@ -155,7 +167,6 @@ export const LobbyView: FC<Props> = ({
    null,
  );
  useEffect(() => {
-    if (mediaVm === null) return;
    const footerScope = new ObservableScope();
    setFooterVm(
      createLobbyFooterViewModel(
@@ -163,7 +174,6 @@ export const LobbyView: FC<Props> = ({
        muteStates,
        devices,
        backgroundEffectsState$,
-        mediaVm.videoTrack$,
        openSettings,
        hangup,
        // Logo and header are connected: only show the logo in SPA with header.
@@ -178,7 +188,6 @@ export const LobbyView: FC<Props> = ({
    backgroundEffectsState$,
    hangup,
    hideHeader,
-    mediaVm,
    muteStates,
    openSettings,
  ]);
@@ -8,7 +8,6 @@ Please see LICENSE in the repository root for full details.
 import { expect, type MockedFunction, test, vi } from "vitest";
 import { act, render } from "@testing-library/react";
 import { BehaviorSubject } from "rxjs";
-import { RTC_CALL_INTENT_AUDIO } from "matrix-js-sdk/lib/matrixrtc";

 import { useAudioContext } from "../useAudioContext";
 import { createRingingMedia } from "../state/media/RingingMediaViewModel";
@@ -40,7 +39,7 @@ test("ringtone plays on loop while ringing", () => {
    userId: alice.userId,
    displayName$: constant("Alice"),
    mxcAvatarUrl$: constant(undefined),
-    intent: RTC_CALL_INTENT_AUDIO,
+    intent: "audio",
    pickupState$,
  });

@@ -12,8 +12,8 @@ import { type RingingMediaViewModel } from "../state/media/RingingMediaViewModel
 import { useBehavior } from "../useBehavior";
 import { useInitial } from "../useInitial";
 import { prefetchSounds } from "../soundUtils";
-import ringtoneMp3 from "../sound/ringtone.mp3?url&no-inline";
-import ringtoneOgg from "../sound/ringtone.ogg?url&no-inline";
+import ringtoneMp3 from "../sound/ringtone.mp3?url";
+import ringtoneOgg from "../sound/ringtone.ogg?url";
 import { type UseAudioContext, useAudioContext } from "../useAudioContext";
 import { useLatest } from "../useLatest";

@@ -5,9 +5,9 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */

-import { useEffect, useMemo, useRef, type FC, type ReactNode } from "react";
+import { useMemo, type FC, type ReactNode } from "react";
 import useMeasure from "react-use-measure";
-import { constant, type LocalVideoMediaTrack } from "@element-hq/matrixrtc-sdk";
+import { type LocalVideoMediaTrack } from "@element-hq/matrixrtc-sdk";
 import classNames from "classnames";
 import { useTranslation } from "react-i18next";

@@ -15,9 +15,8 @@ import { TileAvatar } from "../tile/TileAvatar";
 import styles from "./VideoPreview.module.css";
 import { type EncryptionSystem } from "../e2ee/sharedKeyManagement";
 import videoPlaceholder from "../graphics/video-placeholder.gif";
-import { useBehavior } from "../useBehavior";
-
-const noFacingMode = constant(undefined);
+import { useAttachedTrack } from "../useAttachedTrack";
+import { sdkCamera } from "../tracks/cameraTrack";

 export type MatrixInfo = {
  userId: string;
@@ -46,15 +45,9 @@ export const VideoPreview: FC<Props> = ({
  const { t } = useTranslation();
  const [previewRef, previewBounds] = useMeasure();

-  const videoEl = useRef<HTMLVideoElement | null>(null);
-
-  useEffect(() => {
-    const element = videoEl.current;
-    if (!element || !videoTrack) return;
-    videoTrack.attach(element);
-    return (): void => videoTrack.detach(element);
-  }, [videoTrack]);
-  const facingMode = useBehavior(videoTrack?.facingMode$ ?? noFacingMode);
+  const { videoRef, mirrored } = useAttachedTrack(
+    videoTrack && sdkCamera(videoTrack),
+  );

  const cameraIsStarting = useMemo(
    () => videoEnabled && !videoTrack,
@@ -64,8 +57,8 @@ export const VideoPreview: FC<Props> = ({
  return (
    <div className={classNames(styles.preview)} ref={previewRef}>
      <video
-        className={facingMode === "user" ? styles.mirror : undefined}
-        ref={videoEl}
+        className={mirrored ? styles.mirror : undefined}
+        ref={videoRef}
        muted
        playsInline
        // There's no reason for this to be focusable
@@ -34,6 +34,23 @@ describe("prefetchSounds", () => {
    expect(bytesOf(sounds.beep)).toEqual([1, 2, 3]);
  });

+  it("decodes base64 data: URLs without fetching them", async () => {
+    // "OggS" — the bytes 0x4f 0x67 0x67 0x53
+    const sounds = await prefetchSounds({
+      beep: { ogg: "data:audio/ogg;base64,T2dnUw==" },
+    });
+    expect(fetchSpy).not.toHaveBeenCalled();
+    expect(bytesOf(sounds.beep)).toEqual([0x4f, 0x67, 0x67, 0x53]);
+  });
+
+  it("leaves out a sound with a percent-encoded data: URL", async () => {
+    const sounds = await prefetchSounds({
+      beep: { ogg: "data:audio/ogg,Ogg%53" },
+    });
+    expect(fetchSpy).not.toHaveBeenCalled();
+    expect(sounds).toEqual({});
+  });
+
  it("leaves out a sound whose response is not okay", async () => {
    fetchSpy.mockResolvedValue(new Response(null, { status: 404 }));
    const sounds = await prefetchSounds({
@@ -43,16 +60,18 @@ describe("prefetchSounds", () => {
  });

  it("leaves out a sound that fails to load, keeping the others", async () => {
-    // Fetched in the order given
-    fetchSpy
-      .mockRejectedValueOnce(new TypeError("Failed to fetch"))
-      .mockResolvedValueOnce(
-        new Response(new Uint8Array([1, 2, 3]), { status: 200 }),
-      );
+    fetchSpy.mockRejectedValue(new TypeError("Failed to fetch"));
    const sounds = await prefetchSounds({
      beep: { ogg: "https://example.org/beep.ogg" },
-      boop: { ogg: "https://example.org/boop.ogg" },
+      boop: { ogg: "data:audio/ogg;base64,T2dnUw==" },
    });
    expect(Object.keys(sounds)).toEqual(["boop"]);
  });
+
+  it("leaves out a sound with a malformed data: URL", async () => {
+    const sounds = await prefetchSounds({
+      beep: { ogg: "data:audio/ogg;base64" },
+    });
+    expect(sounds).toEqual({});
+  });
 });
@@ -32,12 +32,38 @@ function getPreferredAudioFormat(): "ogg" | "mp3" {

 const preferredFormat = getPreferredAudioFormat();

+/**
+ * Decode a `data:` URL into the bytes it carries.
+ *
+ * The component build inlines the sound files as `data:` URLs. Those could be
+ * `fetch`ed like any other URL, but that fetch is subject to the host page's
+ * Content Security Policy, and `connect-src` lists rarely allow `data:` (a `*`
+ * source does not cover it). Reading the bytes out of the URL directly needs no
+ * network access, so no policy can stop it.
+ * @param url The `data:` URL to decode.
+ * @returns The decoded bytes.
+ */
+function decodeDataUrl(url: string): ArrayBuffer {
+  const separator = url.indexOf(",");
+  if (!url.startsWith("data:") || separator === -1)
+    throw new Error("Not a valid data: URL");
+  const header = url.slice("data:".length, separator);
+  // Vite only percent-encodes SVGs; every other inlined asset is base64.
+  if (!header.split(";").includes("base64"))
+    throw new Error("Only base64 data: URLs are supported");
+  // `decoded` is a binary string: one char per byte
+  const decoded = atob(url.slice(separator + 1));
+  const bytes = Uint8Array.from(decoded, (c) => c.charCodeAt(0));
+  return bytes.buffer;
+}
+
 /**
 * Load the bytes of a single sound file.
- * @param url Where the sound is.
+ * @param url Where the sound is: an ordinary URL to fetch, or a `data:` URL.
 * @returns The bytes, or null if the sound could not be loaded.
 */
 async function loadSound(url: string): Promise<ArrayBuffer | null> {
+  if (url.startsWith("data:")) return decodeDataUrl(url);
  const response = await fetch(url);
  if (isFailure(response)) return null;
  return await response.arrayBuffer();
@@ -7,11 +7,7 @@ Please see LICENSE in the repository root for full details.

 import { it, vi, expect, beforeEach, afterEach, describe } from "vitest";
 import { firstValueFrom, of, Subject, take, toArray } from "rxjs";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  RTC_CALL_INTENT_VIDEO,
-  type RTCCallIntent,
-} from "matrix-js-sdk/lib/matrixrtc";
+import { type RTCCallIntent } from "matrix-js-sdk/lib/matrixrtc";

 import { AndroidControlledAudioOutput } from "./AndroidControlledAudioOutput.ts";
 import type { Controls, OutputDevice } from "../controls";
@@ -121,7 +117,7 @@ describe("Default selection", () => {
    const controlledAudioOutput = new AndroidControlledAudioOutput(
      of(BASE_DEVICE_LIST),
      testScope,
-      RTC_CALL_INTENT_VIDEO,
+      "video",
      mockControls,
    );

@@ -146,7 +142,7 @@ describe("Default selection", () => {
    const controlledAudioOutput = new AndroidControlledAudioOutput(
      of(BASE_DEVICE_LIST),
      testScope,
-      RTC_CALL_INTENT_AUDIO,
+      "audio",
      mockControls,
    );

@@ -167,7 +163,7 @@ describe("Default selection", () => {
    });
  });

-  [RTC_CALL_INTENT_AUDIO, RTC_CALL_INTENT_VIDEO].forEach((callIntent) => {
+  ["audio", "video"].forEach((callIntent) => {
    it(`Default to BT headset for ${callIntent} calls if present`, async () => {
      const controlledAudioOutput = new AndroidControlledAudioOutput(
        of(BT_HEADSET_BASE_DEVICE_LIST),
@@ -194,7 +190,7 @@ describe("Default selection", () => {
    });
  });

-  [RTC_CALL_INTENT_AUDIO, RTC_CALL_INTENT_VIDEO].forEach((callIntent) => {
+  ["audio", "video"].forEach((callIntent) => {
    it(`Default to wired headset for ${callIntent} calls if present`, async () => {
      const controlledAudioOutput = new AndroidControlledAudioOutput(
        of(WIRED_HEADSET_BASE_DEVICE_LIST),
@@ -304,7 +300,7 @@ describe("Test select a device", () => {
          b: BT_HEADSET_BASE_DEVICE_LIST,
        }),
        testScope,
-        RTC_CALL_INTENT_AUDIO,
+        "audio",
        mockControls,
      );

@@ -344,7 +340,7 @@ describe("Test select a device", () => {
          c: BASE_DEVICE_LIST,
        }),
        testScope,
-        RTC_CALL_INTENT_AUDIO,
+        "audio",
        mockControls,
      );

@@ -397,7 +393,7 @@ describe("Available device changes", () => {
  });

  it("When a BT headset is added, control should switch to use it", () => {
-    createAudioControlledOutput(RTC_CALL_INTENT_VIDEO);
+    createAudioControlledOutput("video");

    // Emit the base device list, the speaker should be selected
    availableSource$.next(BASE_DEVICE_LIST);
@@ -423,9 +419,7 @@ describe("Available device changes", () => {

  // Android does not set `isExternalHeadset` to true for wired headphones, so we can't test this case.'
  it.skip("When a wired headset is added, control should switch to use it", async () => {
-    const controlledAudioOutput = createAudioControlledOutput(
-      RTC_CALL_INTENT_VIDEO,
-    );
+    const controlledAudioOutput = createAudioControlledOutput("video");

    // Emit the base device list, the speaker should be selected
    availableSource$.next(BASE_DEVICE_LIST);
@@ -452,7 +446,7 @@ describe("Available device changes", () => {
  });

  it("When the active bt headset is removed on audio call, control should switch to earpiece", () => {
-    createAudioControlledOutput(RTC_CALL_INTENT_AUDIO);
+    createAudioControlledOutput("audio");

    // Emit the BT headset device list, the BT headset should be selected
    availableSource$.next(BT_HEADSET_BASE_DEVICE_LIST);
@@ -478,7 +472,7 @@ describe("Available device changes", () => {
  });

  it("When the active bt headset is removed on video call, control should switch to speaker", () => {
-    createAudioControlledOutput(RTC_CALL_INTENT_VIDEO);
+    createAudioControlledOutput("video");

    availableSource$.next(BT_HEADSET_BASE_DEVICE_LIST);

@@ -503,7 +497,7 @@ describe("Available device changes", () => {
  });

  it("Do not repeatidly set the same device", () => {
-    createAudioControlledOutput(RTC_CALL_INTENT_VIDEO);
+    createAudioControlledOutput("video");

    availableSource$.next(BT_HEADSET_BASE_DEVICE_LIST);
    availableSource$.next(BT_HEADSET_BASE_DEVICE_LIST);
@@ -22,10 +22,7 @@ import {
  type SelectedAudioOutputDevice,
 } from "./MediaDevices.ts";
 import type { ObservableScope } from "./ObservableScope.ts";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  type RTCCallIntent,
-} from "matrix-js-sdk/lib/matrixrtc";
+import type { RTCCallIntent } from "matrix-js-sdk/lib/matrixrtc";
 import { type Controls, type OutputDevice } from "../controls.ts";
 import { type Behavior } from "./Behavior.ts";

@@ -105,7 +102,7 @@ export class AndroidControlledAudioOutput implements MediaDevice<
   * @constructor
   * @param controlledDevices$ - The list of available output devices coming from the hosting application, ordered by preference order (most preferred first).
   * @param scope - The ObservableScope to create the Behaviors in.
-   * @param initialIntent - The initial call intent (e.g. "m.audio" or "m.video") that can be used to determine the default audio routing (e.g. default to earpiece for audio calls and speaker for video calls).
+   * @param initialIntent - The initial call intent (e.g. "audio" or "video") that can be used to determine the default audio routing (e.g. default to earpiece for audio calls and speaker for video calls).
   * @param controls - The controls provided by the hosting application to control the audio routing and notify of user actions.
   */
  public constructor(
@@ -319,7 +316,7 @@ export class AndroidControlledAudioOutput implements MediaDevice<
    this.logger.debug(
      `Android routing logic intent: ${this.initialIntent} finding best default...`,
    );
-    if (this.initialIntent === RTC_CALL_INTENT_AUDIO) {
+    if (this.initialIntent === "audio") {
      const systemProposed = available[0];
      // If no headset is connected, android will route to the speaker by default,
      // but for a voice call we want to route to the earpiece instead,
@@ -6,7 +6,7 @@ Please see LICENSE in the repository root for full details.
 */

 import { beforeEach, describe, expect, it, vi } from "vitest";
-import { BehaviorSubject, distinctUntilChanged, map, of } from "rxjs";
+import { BehaviorSubject, distinctUntilChanged, map } from "rxjs";
 import { type BackgroundProcessorWrapper } from "@livekit/track-processors";

 import {
@@ -47,28 +47,23 @@ function fakePipeline(): {
  };
 }

-/** One letter per state: idle, preparing, waiting for a frame, attached. */
+/** One letter per state: idle, waiting for a frame, attached. */
 function letter(state: BackgroundEffectsState): string {
-  if (state.supported === false) return "x";
-  if (state.wait === "preparing") return "p";
  if (state.processor === undefined) return "i";
-  return state.wait === "settling" ? "w" : "a";
+  return state.settling ? "w" : "a";
 }

 describe("the pipeline's state", () => {
  function testState({
    effect,
-    answer = "-y",
    firstFrame = "",
    expected,
  }: {
    effect: string;
-    /** When the trial build answers, from being asked. */
-    answer?: string;
    firstFrame?: string;
    expected: string;
  }): void {
-    withTestScheduler(({ behavior, cold, schedule, expectObservable }) => {
+    withTestScheduler(({ behavior, schedule, expectObservable }) => {
      const transformer = {
        onFirstFrame: undefined as (() => void) | undefined,
      };
@@ -77,7 +72,6 @@ describe("the pipeline's state", () => {
        effect$: behavior(effect, { n: "none", b: "blur" }),
        setEffect: vi.fn(),
        added$: new BehaviorSubject<AddedBackground[] | undefined>([]),
-        canSegment: () => cold(answer, { y: true, n: false }),
        pipeline: fakePipeline().pipeline,
        transformer,
      });
@@ -90,21 +84,15 @@ describe("the pipeline's state", () => {

  it("defaults to no effect", () => testState({ effect: "n", expected: "i" }));

-  it("attaches only once it is known the pipeline builds", () =>
-    testState({ effect: "nb", answer: "--y", expected: "ip-w" }));
-
-  it("offers none where the pipeline fails to build", () =>
-    testState({ effect: "nb", answer: "-n", expected: "ipx" }));
-
  it("waits from the first effect until a frame carries it", () =>
    testState({
-      effect: "    nb---n-b",
-      firstFrame: "---f",
-      expected: "  ipwa",
+      effect: "    nb-n-b",
+      firstFrame: "  --f",
+      expected: "  iwa",
    }));

  it("attaches on first use and stays attached", () =>
-    testState({ effect: "nb--n", firstFrame: "---f", expected: "ipwa" }));
+    testState({ effect: "nb-n", firstFrame: "--f", expected: "iwa" }));
 });

 describe("background effects", () => {
@@ -121,7 +109,6 @@ describe("background effects", () => {
      effect$,
      setEffect,
      added$,
-      canSegment: () => of(true),
      pipeline: fake.pipeline,
      transformer: { onFirstFrame: undefined },
      ...options,
@@ -131,6 +118,8 @@ describe("background effects", () => {
    effect$.next(raw);
    await flushPromises();
  };
+  const blur = async (on: boolean): Promise<void> =>
+    choose(on ? "blur" : "none");

  beforeEach(() => {
    effect$ = new BehaviorSubject("none");
@@ -139,17 +128,6 @@ describe("background effects", () => {
    fake = fakePipeline();
  });

-  it("offers none for the session where the pipeline fails to build", async () => {
-    const effects = build({ canSegment: () => of(false) });
-    await choose("blur");
-
-    expect(effects.state$.value.supported).toBe(false);
-    expect(effects.state$.value.processor).toBeUndefined();
-    expect(effects.state$.value.wait).toBeUndefined();
-    // A browser update may fix it, so the next session asks again.
-    expect(effect$.value).toBe("blur");
-  });
-
  it("puts a shipped background on as that picture", async () => {
    build();
    await choose(`image:${shippedBackgrounds[0].id}`);
@@ -163,10 +141,10 @@ describe("background effects", () => {

  it("switches in place rather than reattaching", async () => {
    const effects = build();
-    await choose("blur");
+    await blur(true);
    const pipeline = effects.state$.value.processor;
-    await choose("none");
-    await choose("blur");
+    await blur(false);
+    await blur(true);

    expect(effects.state$.value.processor).toBe(pipeline);
    expect(fake.switches).toEqual([
@@ -179,18 +157,18 @@ describe("background effects", () => {
  it("keeps switching after a switch fails", async () => {
    vi.mocked(fake.pipeline.switchTo).mockRejectedValueOnce(new Error("lost"));
    build();
-    await choose("blur");
-    await choose("none");
+    await blur(true);
+    await blur(false);
    expect(fake.switches).toEqual([{ mode: "disabled" }]);
  });

  it("switches one at a time, skipping those overtaken", async () => {
    const finished = fake.holdNext();
    build();
-    await choose("blur");
-    await choose("none");
-    await choose("blur");
-    await choose("none");
+    await blur(true);
+    await blur(false);
+    await blur(true);
+    await blur(false);
    expect(fake.switches).toHaveLength(1);

    finished();
@@ -8,15 +8,9 @@ Please see LICENSE in the repository root for full details.
 import {
  combineLatest,
  distinctUntilChanged,
-  first,
-  from,
  map,
  Observable,
-  type ObservableInput,
-  of,
  scan,
-  startWith,
-  switchMap,
 } from "rxjs";
 import {
  type BackgroundProcessorWrapper,
@@ -38,18 +32,17 @@ import {
  parseEffect,
 } from "../tracks/backgroundEffectCatalog";
 import { type AddedBackground } from "../tracks/backgroundImages";
+import { SyncedCameraTrack } from "../tracks/cameraTrack";

 const blurRadius = 15;

 export interface BackgroundEffectsState {
  supported: boolean | undefined;
  processor: undefined | VideoProcessor;
-  /**
-   * The effect is not ready:
-   * preparing, asking whether the pipeline can be built.
-   * settling, once it is attached until a frame carrying the effect
-   */
-  wait?: "preparing" | "settling";
+  /** From the first effect chosen until a frame carrying it is drawn. */
+  settling?: boolean;
+  /** The camera this provider's pipeline is synced to. */
+  cameraTrack?: SyncedCameraTrack;
 }

 export interface BackgroundEffectsOptions {
@@ -61,8 +54,6 @@ export interface BackgroundEffectsOptions {
  setEffect: (id: EffectId) => void;
  /** The backgrounds the device keeps, undefined until it has said. */
  added$: Behavior<AddedBackground[] | undefined>;
-  /** Builds a segmenter on trial, and answers whether it could. */
-  canSegment: () => ObservableInput<boolean>;
  /** The background processor pipeline to be switched between effects. */
  pipeline: BackgroundProcessorWrapper;
  /** Tells, once, that a frame carrying an effect has been drawn. */
@@ -82,19 +73,18 @@ export function createBackgroundEffects(
    effect$,
    setEffect,
    added$,
-    canSegment,
    pipeline,
    transformer,
  }: BackgroundEffectsOptions,
 ): BackgroundEffects {
  // Wrapped once, so the call and the preview see one processor throughout.
  const processor = fromLivekitProcessor(pipeline);
+  // The camera the pipeline is synced to.
+  const cameraTrack = new SyncedCameraTrack();
  const choice$ = effect$.pipe(map(parseEffect));
-  const wanted$ = scope.behavior(
-    choice$.pipe(
-      map((effect) => effect.kind !== "none"),
-      distinctUntilChanged(),
-    ),
+  const wanted$ = choice$.pipe(
+    map((effect) => effect.kind !== "none"),
+    distinctUntilChanged(),
  );

  combineLatest([choice$, added$])
@@ -110,18 +100,6 @@ export function createBackgroundEffects(
        setEffect("none");
    });

-  // Asked once an effect is first wanted. A browser update may fix what
-  // fails, so the choice is kept for the next session rather than cleared.
-  const buildable$ = scope.behavior<boolean | undefined>(
-    supported
-      ? wanted$.pipe(
-          first(Boolean),
-          switchMap(() => from(canSegment())),
-          startWith(undefined),
-        )
-      : of(undefined),
-  );
-
  const drewAFrame$ = scope.behavior(
    new Observable<boolean>((subscriber) => {
      subscriber.next(false);
@@ -132,25 +110,19 @@ export function createBackgroundEffects(
    }),
  );

-  // In one step, so that nothing sees the pipeline neither preparing nor
-  // attached.
  const state$ = scope.behavior(
-    combineLatest([wanted$, buildable$, drewAFrame$]).pipe(
-      scan<[boolean, boolean | undefined, boolean], BackgroundEffectsState>(
-        (previous, [wanted, buildable, drewAFrame]) => {
+    combineLatest([wanted$, drewAFrame$]).pipe(
+      scan<[boolean, boolean], BackgroundEffectsState>(
+        (previous, [wanted, drewAFrame]) => {
          // Attached the first time an effect is wanted and never detached
          // after, so someone who never turns one on pays for none of it.
          const enable =
-            previous.processor !== undefined || (wanted && buildable === true);
-          const preparing = supported && wanted && buildable === undefined;
+            previous.processor !== undefined || (supported && wanted);
          return {
-            supported: supported && buildable !== false,
+            supported,
            processor: enable ? processor : undefined,
-            wait: preparing
-              ? "preparing"
-              : enable && !drewAFrame
-                ? "settling"
-                : undefined,
+            settling: enable && !drewAFrame,
+            cameraTrack,
          };
        },
        { supported, processor: undefined },
@@ -12,11 +12,7 @@ import {
  MatrixEvent,
  type Room,
 } from "matrix-js-sdk";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  RTC_CALL_INTENT_VIDEO,
-  type RTCCallIntent,
-} from "matrix-js-sdk/lib/matrixrtc";
+import { type RTCCallIntent } from "matrix-js-sdk/lib/matrixrtc";
 import { map, mergeMap, NEVER, type Observable, startWith } from "rxjs";

 import { withTestScheduler } from "../../utils/test";
@@ -37,12 +33,10 @@ function mockRingEvent(
  eventId: string,
  lifetimeMs: number | undefined,
  sender = local.userId,
-  legacyIntent?: string,
 ): CallNotificationWrapper {
  return {
    event_id: eventId,
    ...(lifetimeMs === undefined ? {} : { lifetime: lifetimeMs }),
-    ...(legacyIntent === undefined ? {} : { "m.call.intent": legacyIntent }),
    notification_type: "ring",
    sender,
  } as unknown as CallNotificationWrapper;
@@ -134,25 +128,7 @@ test("ring attempt times out after nobody joins", () => {
    });

    expectObservable(summarizeRingAttempts$(ringAttempts$)).toBe("-a 29ms A", {
-      a: { intent: RTC_CALL_INTENT_AUDIO, recipient: alice.userId },
-      A: { outcome: "timeout" },
-    });
-  });
-});
-
-test("ring attempt maps the legacy intent on the notification to its stable value", () => {
-  withTestScheduler(({ scope, expectObservable, hot }) => {
-    const { ringAttempts$ } = createCallNotificationLifecycle$({
-      scope,
-      ...defaultProps,
-      memberUserIds$: constant<string[]>([]),
-      sentCallNotification$: hot("-a", {
-        a: mockRingEvent("$notif1", 30, local.userId, "video"),
-      }),
-    });
-
-    expectObservable(summarizeRingAttempts$(ringAttempts$)).toBe("-a 29ms A", {
-      a: { intent: RTC_CALL_INTENT_VIDEO, recipient: alice.userId },
+      a: { intent: "audio", recipient: alice.userId },
      A: { outcome: "timeout" },
    });
  });
@@ -172,7 +148,7 @@ test("ring attempt is accepted once recipient joins", () => {
    });

    expectObservable(summarizeRingAttempts$(ringAttempts$)).toBe("-aA", {
-      a: { intent: RTC_CALL_INTENT_AUDIO, recipient: alice.userId },
+      a: { intent: "audio", recipient: alice.userId },
      A: { outcome: "accept" },
    });
  });
@@ -190,7 +166,7 @@ test("ring attempt is immediately accepted if recipient is already joined", () =
    });

    expectObservable(summarizeRingAttempts$(ringAttempts$)).toBe("-(aA)", {
-      a: { intent: RTC_CALL_INTENT_AUDIO, recipient: alice.userId },
+      a: { intent: "audio", recipient: alice.userId },
      A: { outcome: "accept" },
    });
  });
@@ -225,7 +201,7 @@ test("ring attempt can be declined", () => {
    });

    expectObservable(summarizeRingAttempts$(ringAttempts$)).toBe("-aA", {
-      a: { intent: RTC_CALL_INTENT_AUDIO, recipient: alice.userId },
+      a: { intent: "audio", recipient: alice.userId },
      A: { outcome: "decline" },
    });
  });
@@ -260,7 +236,7 @@ test("ring attempt times out if recipient declines too late", () => {
    });

    expectObservable(summarizeRingAttempts$(ringAttempts$)).toBe("-a 29ms A", {
-      a: { intent: RTC_CALL_INTENT_AUDIO, recipient: alice.userId },
+      a: { intent: "audio", recipient: alice.userId },
      A: { outcome: "timeout" },
    });
  });
@@ -295,7 +271,7 @@ test("decline event relating to wrong event is ignored (times out)", () => {
    });

    expectObservable(summarizeRingAttempts$(ringAttempts$)).toBe("-a 29ms A", {
-      a: { intent: RTC_CALL_INTENT_AUDIO, recipient: alice.userId },
+      a: { intent: "audio", recipient: alice.userId },
      A: { outcome: "timeout" },
    });
  });
@@ -330,7 +306,7 @@ test("decline event from wrong sender is ignored (times out)", () => {
    });

    expectObservable(summarizeRingAttempts$(ringAttempts$)).toBe("-a 29ms A", {
-      a: { intent: RTC_CALL_INTENT_AUDIO, recipient: alice.userId },
+      a: { intent: "audio", recipient: alice.userId },
      A: { outcome: "timeout" },
    });
  });
@@ -9,9 +9,7 @@ import {
  type IRTCNotificationContent,
  type MatrixRTCSession,
  MatrixRTCSessionEvent,
-  RTC_CALL_INTENT_AUDIO,
  type RTCCallIntent,
-  toStableCallIntent,
 } from "matrix-js-sdk/lib/matrixrtc";
 import {
  filter,
@@ -157,10 +155,7 @@ export function createCallNotificationLifecycle$({
        );

        return of({
-          // The notification still carries the legacy intent values
-          intent:
-            toStableCallIntent(notificationEvent["m.call.intent"]) ??
-            RTC_CALL_INTENT_AUDIO,
+          intent: notificationEvent["m.call.intent"] ?? "audio",
          recipient,
          outcome$: race(timeout$, accept$, decline$).pipe(
            take(1),
@@ -21,7 +21,6 @@ import {
  type CallMembership,
  type IRTCNotificationContent,
  MatrixRTCSessionEvent,
-  RTC_CALL_INTENT_AUDIO,
 } from "matrix-js-sdk/lib/matrixrtc";
 import { deepCompare } from "matrix-js-sdk/lib/utils";

@@ -71,11 +70,9 @@ import {
 } from "./CallViewModel.ts";
 import { type Handler, MuteState } from "../MuteStates.ts";
 import {
-  type LocalVideoMediaTrack,
  type RTCParticipation,
  type VideoProcessor,
 } from "@element-hq/matrixrtc-sdk";
-import { type BackgroundEffectsState } from "../BackgroundEffects";

 initializeWidget();

@@ -1560,7 +1557,7 @@ describe.each(modes)("CallViewModel (%s mode)", (mode) => {
            b: expect.objectContaining({
              type: "ringing",
              userId: alice.userId,
-              intent: RTC_CALL_INTENT_AUDIO,
+              intent: "audio",
            }),
          });
          // Layout should show placeholder media for the participant we're
@@ -1606,7 +1603,7 @@ describe.each(modes)("CallViewModel (%s mode)", (mode) => {
            b: expect.objectContaining({
              type: "ringing",
              userId: alice.userId,
-              intent: RTC_CALL_INTENT_AUDIO,
+              intent: "audio",
            }),
          });
          // Layout should show placeholder media for the participant we're
@@ -1695,113 +1692,28 @@ describe("a camera with a video processor", () => {
        muteStates,
        mockMediaDevices({}),
        {},
-        { supported: true, processor },
+        processor,
      ).find((request) => request.source === "camera"),
    ).toMatchObject({ processor });
  });

-  it("leaves the camera out of the join while the processor is prepared", () => {
-    const muteStates = mockMuteStates();
-    vi.spyOn(muteStates.video.enabled$, "value", "get").mockReturnValue(true);
-    const sources = (wait?: "preparing"): string[] =>
-      initialPublishRequests(
-        muteStates,
-        mockMediaDevices({}),
-        {},
-        {
-          supported: true,
-          processor: undefined,
-          wait,
-        },
-      ).map((request) => request.source);
-    expect(sources("preparing")).not.toContain("camera");
-    expect(sources()).toContain("camera");
-  });
-
-  it("waits to make a camera track until it is known the processor builds", async () => {
-    const setHandler = vi.spyOn(MuteState.prototype, "setHandler");
-    onTestFinished(() => setHandler.mockRestore());
-    const effects$ = new BehaviorSubject<BackgroundEffectsState>({
-      supported: true,
-      processor: undefined,
-      wait: "preparing",
-    });
-    let participation: RTCParticipation | undefined;
-    withCallViewModel(
-      {},
-      (_vm, _session, { rtcParticipation }) => {
-        participation = rtcParticipation;
-      },
-      { backgroundEffectsState$: effects$ },
-    );
-    const camera = participation!.localMember$.value?.tracks$.value?.find(
-      (track) => track.source === "camera",
-    ) as LocalVideoMediaTrack;
-    const turnedOn = cameraHandler(setHandler)(true);
-    await flushPromises();
-    expect(camera.setEnabled).not.toHaveBeenCalledWith(true);
-
-    effects$.next({ supported: true, processor });
-    await turnedOn;
-    expect(camera.setEnabled).toHaveBeenCalledWith(true);
-    expect(participation!.publish).not.toHaveBeenCalled();
-  });
-
-  it("turns the camera on only once its processor is on the track", async () => {
-    const setHandler = vi.spyOn(MuteState.prototype, "setHandler");
-    onTestFinished(() => setHandler.mockRestore());
-    const effects$ = new BehaviorSubject<BackgroundEffectsState>({
-      supported: true,
-      processor: undefined,
-      wait: "preparing",
-    });
-    let participation: RTCParticipation | undefined;
-    withCallViewModel(
-      {},
-      (_vm, _session, { rtcParticipation }) => {
-        participation = rtcParticipation;
-      },
-      { backgroundEffectsState$: effects$ },
-    );
-    const camera = participation!.localMember$.value?.tracks$.value?.find(
-      (track) => track.source === "camera",
-    ) as LocalVideoMediaTrack;
-    // Attaching takes its time, as the pipeline is built on the track
-    let attached!: () => void;
-    vi.mocked(camera.setProcessor).mockReturnValueOnce(
-      new Promise<void>((resolve) => {
-        attached = resolve;
-      }),
-    );
-    const turnedOn = cameraHandler(setHandler)(true);
-    effects$.next({ supported: true, processor });
-    await flushPromises();
-    expect(camera.setProcessor).toHaveBeenCalledWith(processor);
-    expect(camera.setEnabled).not.toHaveBeenCalledWith(true);
-
-    attached();
-    await turnedOn;
-    expect(camera.setEnabled).toHaveBeenCalledWith(true);
-  });
-
  // The SDK builds the processor on the camera's restart, before the room
  // sees a frame, so the track is unmuted rather than published anew
  it("turns on a camera turned off before the processor was chosen", async () => {
    const setHandler = vi.spyOn(MuteState.prototype, "setHandler");
    onTestFinished(() => setHandler.mockRestore());
-    const effects$ = new BehaviorSubject<BackgroundEffectsState>({
-      supported: true,
-      processor: undefined,
-    });
+    const videoProcessor$ = new BehaviorSubject<VideoProcessor | undefined>(
+      undefined,
+    );
    let participation: RTCParticipation | undefined;
    withCallViewModel(
      {},
      (_vm, _session, { rtcParticipation }) => {
        participation = rtcParticipation;
      },
-      { backgroundEffectsState$: effects$ },
+      { videoProcessor$ },
    );
-    effects$.next({ supported: true, processor });
+    videoProcessor$.next(processor);
    await cameraHandler(setHandler)(true);
    await flushPromises();

@@ -37,7 +37,6 @@ import {
  combineLatest,
  distinctUntilChanged,
  filter,
-  firstValueFrom,
  fromEvent,
  map,
  merge,
@@ -78,7 +77,6 @@ import {
  type ReactionInfo,
  type ReactionOption,
 } from "../../reactions";
-import { type BackgroundEffectsState } from "../BackgroundEffects";
 import { shallowEquals as arrayShallowEquals } from "../../utils/array";
 import { type MediaDevices } from "../MediaDevices";
 import { type MuteStates } from "../MuteStates";
@@ -172,16 +170,13 @@ export function initialPublishRequests(
  muteStates: MuteStates,
  mediaDevices: MediaDevices,
  capture: CaptureSettings,
-  effects?: BackgroundEffectsState,
+  processor?: VideoProcessor,
 ): PublishRequest[] {
  const requests: PublishRequest[] = [];
  if (muteStates.audio.enabled$.value)
    requests.push(publishRequest("microphone", mediaDevices, capture));
-  // Left out while the processor is prepared; the call publishes it after
-  if (muteStates.video.enabled$.value && effects?.wait !== "preparing")
-    requests.push(
-      publishRequest("camera", mediaDevices, capture, effects?.processor),
-    );
+  if (muteStates.video.enabled$.value)
+    requests.push(publishRequest("camera", mediaDevices, capture, processor));
  return requests;
 }

@@ -192,8 +187,8 @@ export interface CallViewModelOptions {
   * defaults otherwise.
   */
  capture?: CaptureSettings;
-  /** The background effects state (preparing, supported...) including the processor itself. */
-  backgroundEffectsState$?: Behavior<BackgroundEffectsState>;
+  /** Background blur and the like, applied to the camera as it changes. */
+  videoProcessor$?: Behavior<VideoProcessor | undefined>;
  /**
   * The application hosting Element Call, which can ask it to hang up and wants
   * to know when the user joins or leaves. Defaults to no host.
@@ -495,21 +490,7 @@ export function createCallViewModel$(
    sentCallNotification$ = of(null),
  } = options;

-  const {
-    capture = {},
-    backgroundEffectsState$ = constant<BackgroundEffectsState>({
-      supported: false,
-      processor: undefined,
-    }),
-  } = options;
-  const videoProcessor$ = scope.behavior(
-    backgroundEffectsState$.pipe(map(({ processor }) => processor)),
-  );
-  // Resolves once it is known whether the processor builds
-  const processorKnown = async (): Promise<unknown> =>
-    firstValueFrom(
-      backgroundEffectsState$.pipe(filter(({ wait }) => wait !== "preparing")),
-    );
+  const { capture = {}, videoProcessor$ = constant(undefined) } = options;
  const localTracks$ = scope.behavior<
    (LocalAudioMediaTrack | LocalVideoMediaTrack)[]
  >(
@@ -533,19 +514,6 @@ export function createCallViewModel$(
    "screenShare",
  ) as Behavior<LocalVideoMediaTrack | undefined>;

-  const processorAttached = followProcessor(
-    scope,
-    camera$,
-    videoProcessor$,
-    logger,
-  );
-
-  // A camera turned on waits for its processor to be known, then to be on
-  // the track: LiveKit restarts the track with whatever processor it has then.
-  const cameraReady = async (): Promise<void> => {
-    await processorKnown();
-    await processorAttached();
-  };
  const supply = (source: "microphone" | "camera"): TrackSupply => ({
    publish: async () =>
      rtcParticipation.publish(
@@ -556,7 +524,6 @@ export function createCallViewModel$(
          source === "camera" ? videoProcessor$.value : undefined,
        ),
      ),
-    ready: source === "camera" ? cameraReady : undefined,
  });
  followMuteState(
    scope,
@@ -583,29 +550,6 @@ export function createCallViewModel$(
  );
  followDevice(scope, camera$, mediaDevices.videoInput, "camera", logger);

-  // A camera wanted at the join was left out of it while the processor was
-  // prepared (see initialPublishRequests), and is published once that is known
-  if (
-    backgroundEffectsState$.value.wait === "preparing" &&
-    muteStates.video.enabled$.value
-  )
-    processorKnown()
-      .then(async () => {
-        if (camera$.value !== undefined || !muteStates.video.enabled$.value)
-          return;
-        await rtcParticipation.publish(
-          publishRequest(
-            "camera",
-            mediaDevices,
-            capture,
-            videoProcessor$.value,
-          ),
-        );
-      })
-      .catch((e) => {
-        logger.error("Failed to publish the camera", e);
-      });
-
  // The output device follows the selection onto the client the same way. A
  // host that routes audio itself picks the output outside the browser, so the
  // client is left alone
@@ -619,6 +563,8 @@ export function createCallViewModel$(
        });
      });

+  followProcessor(scope, camera$, videoProcessor$, logger);
+
  const members$ = scope.behavior<(LocalRTCMember | RemoteRTCMember)[]>(
    combineLatest(
      [rtcParticipation.localMember$, rtcParticipation.remoteMembers$],
@@ -21,10 +21,6 @@ import {
  EARPIECE_CONFIG_ID,
  IOSControlledAudioOutput,
 } from "./IOSControlledAudioOutput";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  RTC_CALL_INTENT_VIDEO,
-} from "matrix-js-sdk/lib/matrixrtc";

 // `vi.mock` calls are hoisted above all imports, so the static imports below
 // already see these mocks. Force the iOS platform so that the virtual earpiece
@@ -85,7 +81,7 @@ describe("Default selection", () => {
    const output = new IOSControlledAudioOutput(
      constant(false),
      testScope,
-      RTC_CALL_INTENT_AUDIO,
+      "audio",
    );
    const selected = latestSelection(output);

@@ -104,7 +100,7 @@ describe("Default selection", () => {
    const output = new IOSControlledAudioOutput(
      constant(false),
      testScope,
-      RTC_CALL_INTENT_VIDEO,
+      "video",
    );
    const selected = latestSelection(output);

@@ -117,7 +113,7 @@ describe("Default selection", () => {
    const output = new IOSControlledAudioOutput(
      constant(false),
      testScope,
-      RTC_CALL_INTENT_AUDIO,
+      "audio",
    );
    const selected = latestSelection(output);

@@ -134,7 +130,7 @@ describe("Explicit selection", () => {
    const output = new IOSControlledAudioOutput(
      constant(false),
      testScope,
-      RTC_CALL_INTENT_AUDIO,
+      "audio",
    );
    const selected = latestSelection(output);

@@ -154,7 +150,7 @@ describe("Explicit selection", () => {
    const output = new IOSControlledAudioOutput(
      constant(false),
      testScope,
-      RTC_CALL_INTENT_AUDIO,
+      "audio",
    );
    const selected = latestSelection(output);

@@ -8,10 +8,7 @@ Please see LICENSE in the repository root for full details.
 import { logger as rootLogger } from "matrix-js-sdk/lib/logger";
 import { combineLatest, merge, startWith, Subject, tap } from "rxjs";

-import {
-  RTC_CALL_INTENT_AUDIO,
-  type RTCCallIntent,
-} from "matrix-js-sdk/lib/matrixrtc";
+import type { RTCCallIntent } from "matrix-js-sdk/lib/matrixrtc";
 import {
  availableOutputDevices$ as controlledAvailableOutputDevices$,
  outputDevice$ as controlledOutputSelection$,
@@ -114,7 +111,7 @@ export class IOSControlledAudioOutput implements MediaDevice<
   * Chooses the default output device when no explicit selection (from the user
   * or the hosting application) has been made yet.
   *
-   * For voice calls (`initialIntent === "m.audio"`) we want to start on the
+   * For voice calls (`initialIntent === "audio"`) we want to start on the
   * earpiece rather than the speaker, like a regular phone call. We only
   * override when the device that would otherwise be the default is the
   * speaker: if the host already routed to a headset (e.g. Bluetooth) — which
@@ -125,7 +122,7 @@ export class IOSControlledAudioOutput implements MediaDevice<
    available: Map<string, AudioOutputDeviceLabel>,
  ): string | undefined {
    const firstId = available.keys().next().value;
-    if (this.initialIntent === RTC_CALL_INTENT_AUDIO) {
+    if (this.initialIntent === "audio") {
      const firstLabel =
        firstId !== undefined ? available.get(firstId) : undefined;
      if (firstLabel?.type === "speaker") {
@@ -21,7 +21,6 @@ import { type MediaDevices } from "./MediaDevices";
 import { MuteStates } from "./MuteStates";
 import { nullHostBridge } from "../HostBridge";
 import { flushPromises, mockMediaDevices, testScope } from "../utils/test";
-import { type BackgroundEffectsState } from "./BackgroundEffects";

 describe("LobbyMediaViewModel", () => {
  it("opens what starts enabled in one capture and follows the devices", async () => {
@@ -136,7 +135,7 @@ function setup(
    muteStates,
    mediaDevices,
    {},
-    constant<BackgroundEffectsState>({ supported: true, processor }),
+    constant(processor),
  );
  return { media, vm, muteStates, mediaDevices };
 }
@@ -13,6 +13,7 @@ import {
  type ObservableScope,
  type PublishRequest,
  trackBySource$,
+  type VideoProcessor,
 } from "@element-hq/matrixrtc-sdk";
 import { logger as rootLogger } from "matrix-js-sdk/lib/logger";
 import { combineLatest, debounceTime, map } from "rxjs";
@@ -24,7 +25,6 @@ import {
 import { type MediaDevices } from "./MediaDevices";
 import { type MuteStates } from "./MuteStates";
 import { followDevice, followProcessor } from "./localMediaControls";
-import { type BackgroundEffectsState } from "./BackgroundEffects";

 export interface LobbyMediaViewModel {
  /** The camera, once open, for the preview. */
@@ -42,13 +42,9 @@ export function createLobbyMediaViewModel(
  muteStates: MuteStates,
  mediaDevices: MediaDevices,
  capture: CaptureSettings,
-  /** No camera is opened while its pipeline is prepared: it would show the room without the processor. */
-  backgroundEffectsState$: Behavior<BackgroundEffectsState>,
+  videoProcessor$: Behavior<VideoProcessor | undefined>,
 ): LobbyMediaViewModel {
  const logger = rootLogger.getChild("[LobbyMedia]");
-  const videoProcessor$ = scope.behavior(
-    backgroundEffectsState$.pipe(map(({ processor }) => processor)),
-  );
  const microphone$ = trackBySource$(
    scope,
    media.tracks$,
@@ -68,19 +64,13 @@ export function createLobbyMediaViewModel(
    muteStates.video.enabled$,
    microphone$,
    camera$,
-    backgroundEffectsState$,
  ])
    .pipe(debounceTime(0), scope.bind())
-    .subscribe(([audio, video, microphone, camera, { wait }]) => {
+    .subscribe(([audio, video, microphone, camera]) => {
      const open: PublishRequest[] = [];
      if (audio && microphone === undefined && !opening.has("microphone"))
        open.push(publishRequest("microphone", mediaDevices, capture));
-      if (
-        video &&
-        camera === undefined &&
-        !opening.has("camera") &&
-        wait !== "preparing"
-      )
+      if (video && camera === undefined && !opening.has("camera"))
        open.push(
          publishRequest(
            "camera",
@@ -35,10 +35,6 @@ import { AudioOutput, MediaDevices } from "./MediaDevices";
 import { AndroidControlledAudioOutput } from "./AndroidControlledAudioOutput";
 import { IOSControlledAudioOutput } from "./IOSControlledAudioOutput";
 import { ObservableScope } from "./ObservableScope";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  RTC_CALL_INTENT_VIDEO,
-} from "matrix-js-sdk/lib/matrixrtc";

 // Which audio output implementation is used is decided by what the app hosting
 // Element Call told it, rather than being discovered from the environment.
@@ -56,7 +52,7 @@ describe("MediaDevices audio output", () => {

    const devices = new MediaDevices(new ObservableScope(), {
      controlledAudioDevices: true,
-      callIntent: RTC_CALL_INTENT_AUDIO,
+      callIntent: "audio",
    });

    expect(devices.audioOutput).toBeInstanceOf(AndroidControlledAudioOutput);
@@ -67,7 +63,7 @@ describe("MediaDevices audio output", () => {

    const devices = new MediaDevices(new ObservableScope(), {
      controlledAudioDevices: true,
-      callIntent: RTC_CALL_INTENT_VIDEO,
+      callIntent: "video",
    });

    expect(devices.audioOutput).toBeInstanceOf(IOSControlledAudioOutput);
@@ -6,11 +6,7 @@ Please see LICENSE in the repository root for full details.
 */

 import { test, expect } from "vitest";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  RTC_CALL_INTENT_VIDEO,
-  type RTCCallIntent,
-} from "matrix-js-sdk/lib/matrixrtc";
+import { type RTCCallIntent } from "matrix-js-sdk/lib/matrixrtc";

 import { calculateInitialMuteState } from "./initialMuteState";

@@ -18,10 +14,10 @@ test.each<{
  callIntent: RTCCallIntent;
  allowJoinUnmutedViaIntent: boolean;
 }>([
-  { callIntent: RTC_CALL_INTENT_AUDIO, allowJoinUnmutedViaIntent: false },
-  { callIntent: RTC_CALL_INTENT_AUDIO, allowJoinUnmutedViaIntent: true },
-  { callIntent: RTC_CALL_INTENT_VIDEO, allowJoinUnmutedViaIntent: false },
-  { callIntent: RTC_CALL_INTENT_VIDEO, allowJoinUnmutedViaIntent: true },
+  { callIntent: "audio", allowJoinUnmutedViaIntent: false },
+  { callIntent: "audio", allowJoinUnmutedViaIntent: true },
+  { callIntent: "video", allowJoinUnmutedViaIntent: false },
+  { callIntent: "video", allowJoinUnmutedViaIntent: true },
  { callIntent: "unknown", allowJoinUnmutedViaIntent: false },
  { callIntent: "unknown", allowJoinUnmutedViaIntent: true },
 ])(
@@ -33,15 +29,15 @@ test.each<{
      allowJoinUnmutedViaIntent,
    );
    expect(audioEnabled).toBe(true);
-    expect(videoEnabled).toBe(callIntent !== RTC_CALL_INTENT_AUDIO);
+    expect(videoEnabled).toBe(callIntent !== "audio");
  },
 );

 test.each<{
  callIntent: RTCCallIntent;
 }>([
-  { callIntent: RTC_CALL_INTENT_AUDIO },
-  { callIntent: RTC_CALL_INTENT_VIDEO },
+  { callIntent: "audio" },
+  { callIntent: "video" },
  { callIntent: "unknown" },
 ])(
  "Should always mute on start if skipping lobby and the host does not vouch for the intent (callIntent: $callIntent)",
@@ -59,8 +55,8 @@ test.each<{
 test.each<{
  callIntent: RTCCallIntent;
 }>([
-  { callIntent: RTC_CALL_INTENT_AUDIO },
-  { callIntent: RTC_CALL_INTENT_VIDEO },
+  { callIntent: "audio" },
+  { callIntent: "video" },
  { callIntent: "unknown" },
 ])(
  "Can start unmuted if skipping lobby and the host vouches for the intent (callIntent: $callIntent)",
@@ -71,6 +67,6 @@ test.each<{
      true,
    );
    expect(audioEnabled).toBe(true);
-    expect(videoEnabled).toBe(callIntent !== RTC_CALL_INTENT_AUDIO);
+    expect(videoEnabled).toBe(callIntent !== "audio");
  },
 );
@@ -6,10 +6,7 @@ Please see LICENSE in the repository root for full details.
 */

 import { logger } from "matrix-js-sdk/lib/logger";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  type RTCCallIntent,
-} from "matrix-js-sdk/lib/matrixrtc";
+import { type RTCCallIntent } from "matrix-js-sdk/lib/matrixrtc";

 /**
 * Calculates the initial mute state for media devices based on configuration.
@@ -43,10 +40,10 @@ export function calculateInitialMuteState(

  // A host that vouches for the intent is a trusted environment, so it allows
  // unmuted by default. Same for when showing a lobby, as users can adjust
-  // their settings there. Additionally, if the call intent is "m.audio", we
+  // their settings there. Additionally, if the call intent is "audio", we
  // disable video by default.
  return {
    audioEnabled: true,
-    videoEnabled: callIntent != RTC_CALL_INTENT_AUDIO,
+    videoEnabled: callIntent != "audio",
  };
 }
@@ -21,8 +21,6 @@ import { type Handler } from "./MuteStates";
 /** How a mute switch gets a track where there is none. */
 export interface TrackSupply {
  publish: () => Promise<unknown>;
-  /** Awaited before a switch turned on acts: a camera waits for its processor to be known. */
-  ready?: () => Promise<unknown>;
 }

 /**
@@ -47,7 +45,6 @@ export function followMuteState(
  let desired = muteState.enabled$.value;
  muteState.setHandler(async (enabled) => {
    desired = enabled;
-    if (enabled) await supply.ready?.();
    const track = track$.value;
    if (track !== undefined) {
      desired = await track.setEnabled(enabled);
@@ -97,23 +94,18 @@ export function followDevice(
 /**
 * Attached once the camera track exists rather than carried in the publish
 * request, so that a new track and a change of processor take the same path.
- * Answers with a wait for the latest attachment to have gone through: a
- * camera turned on before then would restart without its processor.
 */
 export function followProcessor(
  scope: ObservableScope,
  camera$: Behavior<LocalVideoMediaTrack | undefined>,
  videoProcessor$: Behavior<VideoProcessor | undefined>,
  logger: Logger,
-): () => Promise<void> {
-  let attached = Promise.resolve();
+): void {
  combineLatest([camera$, videoProcessor$])
    .pipe(scope.bind())
    .subscribe(([camera, processor]) => {
-      attached =
-        camera?.setProcessor(processor).catch((e) => {
-          logger.error("Failed to set the video processor", e);
-        }) ?? Promise.resolve();
+      camera?.setProcessor(processor).catch((e) => {
+        logger.error("Failed to set the video processor", e);
+      });
    });
-  return async () => attached;
 }
@@ -8,10 +8,7 @@ Please see LICENSE in the repository root for full details.
 import { test, expect } from "vitest";
 import { act, render, screen } from "@testing-library/react";
 import { axe } from "vitest-axe";
-import {
-  RTC_CALL_INTENT_AUDIO,
-  type MatrixRTCSession,
-} from "matrix-js-sdk/lib/matrixrtc";
+import { type MatrixRTCSession } from "matrix-js-sdk/lib/matrixrtc";
 import { BehaviorSubject } from "rxjs";

 import { GridTile } from "./GridTile";
@@ -125,7 +122,7 @@ test("GridTile displays ringing media", async () => {
  const vm = createRingingMedia({
    pickupState$,
    id: "test",
-    intent: RTC_CALL_INTENT_AUDIO,
+    intent: "audio",
    userId: "@alice:example.org",
    displayName$: constant("Alice"),
    mxcAvatarUrl$: constant(undefined),
@@ -12,7 +12,6 @@ import {
  EndCallIcon,
 } from "@vector-im/compound-design-tokens/assets/web/icons";
 import { useTranslation } from "react-i18next";
-import { RTC_CALL_INTENT_VIDEO } from "matrix-js-sdk/lib/matrixrtc";

 import { type RingingMediaViewModel } from "../state/media/RingingMediaViewModel";
 import { useBehavior } from "../useBehavior";
@@ -26,7 +25,7 @@ export const RingingStatus: FC<Props> = ({ vm }) => {
  const pickupState = useBehavior(vm.pickupState$);
  const Icon =
    pickupState === "ringing"
-      ? vm.intent === RTC_CALL_INTENT_VIDEO
+      ? vm.intent === "video"
        ? VideoCallSolidIcon
        : VoiceCallSolidIcon
      : EndCallIcon;
@@ -11,7 +11,6 @@ import { axe } from "vitest-axe";
 import userEvent from "@testing-library/user-event";
 import { TooltipProvider } from "@vector-im/compound-web";
 import { BehaviorSubject } from "rxjs";
-import { RTC_CALL_INTENT_AUDIO } from "matrix-js-sdk/lib/matrixrtc";

 import { SpotlightTile } from "./SpotlightTile";
 import {
@@ -177,7 +176,7 @@ test("SpotlightTile displays ringing media", async () => {
  const vm = createRingingMedia({
    pickupState$,
    id: "test",
-    intent: RTC_CALL_INTENT_AUDIO,
+    intent: "audio",
    userId: "@alice:example.org",
    displayName$: constant("Alice"),
    mxcAvatarUrl$: constant(undefined),
@@ -13,20 +13,13 @@ import {
 } from "@livekit/track-processors";
 import { ImageSegmenter } from "@mediapipe/tasks-vision";

-import {
-  BackgroundEffectTransformer,
-  canSegment,
-} from "./BackgroundEffectTransformer";
+import { BackgroundEffectTransformer } from "./BackgroundEffectTransformer";

 const frame = {} as VideoFrame;
 const controller = {} as TransformStreamDefaultController<VideoFrame>;
-const stats = { processingTimeMs: 1, segmentationTimeMs: 1, filterTimeMs: 0 };

 describe("BackgroundEffectTransformer", () => {
-  afterEach(() => {
-    vi.restoreAllMocks();
-    vi.unstubAllGlobals();
-  });
+  afterEach(() => vi.restoreAllMocks());

  it("loads a background chosen before it was built", async () => {
    vi.spyOn(VideoTransformer.prototype, "init").mockResolvedValue();
@@ -48,29 +41,10 @@ describe("BackgroundEffectTransformer", () => {
    expect(load).toHaveBeenCalledWith("/background.jpg");
  });

-  it("runs MediaPipe from its own bundle", async () => {
-    vi.spyOn(VideoTransformer.prototype, "init").mockResolvedValue();
-    const create = vi
-      .spyOn(ImageSegmenter, "createFromOptions")
-      .mockResolvedValue({} as ImageSegmenter);
-
-    await new BackgroundEffectTransformer({ backgroundDisabled: true }).init(
-      {} as VideoTransformerInitOptions,
-    );
-
-    const [fileset, options] = create.mock.calls[0];
-    expect(fileset.wasmLoaderPath).toMatch(/vision_wasm_internal\.js/);
-    expect(fileset.wasmBinaryPath).toMatch(/vision_wasm_internal\.wasm/);
-    expect(options.baseOptions?.modelAssetPath).toMatch(
-      /selfie_segmenter\.tflite/,
-    );
-  });
-
  it("reports the first frame carrying an effect, once", async () => {
-    // The library reports every frame it draws.
    vi.spyOn(BackgroundTransformer.prototype, "transform").mockImplementation(
      async function (this: BackgroundTransformer) {
-        this.options.onFrameProcessed?.(stats);
+        this.isFirstFrame = false;
        return Promise.resolve();
      },
    );
@@ -93,37 +67,6 @@ describe("BackgroundEffectTransformer", () => {
    expect(transformer.onFirstFrame).not.toHaveBeenCalled();
  });

-  it("keeps reporting drawn frames to whoever asked", async () => {
-    vi.spyOn(BackgroundTransformer.prototype, "transform").mockImplementation(
-      async function (this: BackgroundTransformer) {
-        this.options.onFrameProcessed?.(stats);
-        return Promise.resolve();
-      },
-    );
-    const onFrameProcessed = vi.fn();
-    const transformer = new BackgroundEffectTransformer({ onFrameProcessed });
-
-    await transformer.transform(frame, controller);
-    expect(onFrameProcessed).toHaveBeenCalledWith(stats);
-  });
-
-  it("never sends the first frame on untouched", async () => {
-    // The library copies its first frame through untouched, ahead of the
-    // drawn one, unless told the first frame is past
-    const seen: boolean[] = [];
-    vi.spyOn(BackgroundTransformer.prototype, "transform").mockImplementation(
-      async function (this: BackgroundTransformer) {
-        seen.push(this.isFirstFrame);
-        return Promise.resolve();
-      },
-    );
-    const transformer = new BackgroundEffectTransformer({});
-    expect(transformer.isFirstFrame).toBe(true);
-
-    await transformer.transform(frame, controller);
-    expect(seen).toEqual([false]);
-  });
-
  it("passes frames on untouched once disabled, even after blurring", async () => {
    const transformer = new BackgroundEffectTransformer({});
    await transformer.update({ blurRadius: 15, backgroundDisabled: false });
@@ -135,33 +78,4 @@ describe("BackgroundEffectTransformer", () => {
    expect(transformer.options.blurRadius).toBeUndefined();
    expect(transformer.options.imagePath).toBeUndefined();
  });
-
-  it("segments on the CPU where the GPU refuses", async () => {
-    vi.spyOn(VideoTransformer.prototype, "init").mockResolvedValue();
-    const build = vi
-      .spyOn(ImageSegmenter, "createFromOptions")
-      .mockRejectedValueOnce(new Error("blocklisted"))
-      .mockResolvedValue({} as ImageSegmenter);
-
-    await new BackgroundEffectTransformer({}).init(
-      {} as VideoTransformerInitOptions,
-    );
-    expect(build.mock.calls.map(([, o]) => o.baseOptions?.delegate)).toEqual([
-      "GPU",
-      "CPU",
-    ]);
-  });
-
-  it("says whether a segmenter can be built at all", async () => {
-    vi.stubGlobal("OffscreenCanvas", class {});
-    const close = vi.fn();
-    const build = vi
-      .spyOn(ImageSegmenter, "createFromOptions")
-      .mockResolvedValue({ close } as unknown as ImageSegmenter);
-    expect(await canSegment()).toBe(true);
-    expect(close).toHaveBeenCalled();
-
-    build.mockRejectedValue(new Error("no model"));
-    expect(await canSegment()).toBe(false);
-  });
 });
@@ -11,18 +11,11 @@ import {
  VideoTransformer,
  type VideoTransformerInitOptions,
  type BackgroundOptions,
-  type SegmenterOptions,
 } from "@livekit/track-processors";
 import { logger } from "matrix-js-sdk/lib/logger";
 import { ImageSegmenter } from "@mediapipe/tasks-vision";

-// Only the SIMD build of MediaPipe's runtime: every browser Element Call
-// supports has WebAssembly SIMD. As files rather than data URLs, so that a
-// host's bundler serves them as assets of its own, and a browser fetches them
-// only when an effect is first switched on.
-import wasmLoaderPath from "@mediapipe/tasks-vision/vision_wasm_internal.js?url&no-inline";
-import wasmBinaryPath from "@mediapipe/tasks-vision/vision_wasm_internal.wasm?url&no-inline";
-import modelAssetPath from "../mediapipe/imageSegmenter/selfie_segmenter.tflite?url&no-inline";
+import modelAssetPath from "../mediapipe/imageSegmenter/selfie_segmenter.tflite?url";

 interface WasmFileset {
  /** The path to the Wasm loader script. */
@@ -31,7 +24,26 @@ interface WasmFileset {
  wasmBinaryPath: string;
 }

-const wasmFileset: WasmFileset = { wasmLoaderPath, wasmBinaryPath };
+// The MediaPipe package, by default, ships some alternative versions of the
+// WASM files which avoid SIMD for compatibility with older browsers. But SIMD
+// in WASM is actually fine by our support policy, so we include just the SIMD
+// versions.
+// It's really not ideal that we have to reference these internal files from
+// MediaPipe and depend on node_modules having this specific structure. It's
+// easy to see this breaking if our dependencies changed and MediaPipe were
+// no longer hoisted, or if we switched to another dependency loader such as
+// yarn PnP.
+// https://github.com/google-ai-edge/mediapipe/issues/5961
+const wasmFileset: WasmFileset = {
+  wasmLoaderPath: new URL(
+    "../../node_modules/@mediapipe/tasks-vision/wasm/vision_wasm_internal.js",
+    import.meta.url,
+  ).href,
+  wasmBinaryPath: new URL(
+    "../../node_modules/@mediapipe/tasks-vision/wasm/vision_wasm_internal.wasm",
+    import.meta.url,
+  ).href,
+};

 /**
 * Track processor that applies effects such as blurring to a user's background.
@@ -41,41 +53,18 @@ const wasmFileset: WasmFileset = { wasmLoaderPath, wasmBinaryPath };
 * resource fetched from the public internet.
 */
 export class BackgroundEffectTransformer extends BackgroundTransformer {
-  /**
-   * Called once, when the first frame carrying an effect has been drawn.
-   * This is used for drewAFrame$ to show the correct loading state.
-   */
+  /** Called once, when the first frame carrying an effect has been drawn. */
  public onFirstFrame: (() => void) | undefined;
-  private drewAFrame = false;
-
-  public constructor(opts: BackgroundOptions) {
-    super(opts);
-    // Called by the library for a frame it drew, never for one it passed on
-    // untouched.
-    this.options.onFrameProcessed = (stats): void => {
-      opts.onFrameProcessed?.(stats);
-      if (this.drewAFrame) return;
-      this.drewAFrame = true;
-      this.onFirstFrame?.();
-    };
-  }

  public override async transform(
    frame: VideoFrame,
    controller: TransformStreamDefaultController<VideoFrame>,
  ): Promise<void> {
-    // From the LK docs:
-    // > Render a copy of the first frame is rendered to the screen as soon as possible to act
-    // > as a less jarring initial state than a solid color while the synchronous work below
-    // > (segmentation + frame rendering) occurs.
-    // We do not want this copy (it leaks unblurred media).
-    // So we always set `isFirstFrame` to false -> never show an unprocessed frame.
-    // It does not have any impact other than setting the unprocessed frame while loading the processor.
-    //
-    // To not show the blank frame, we have our own mechanism for hiding the loading overlay:
-    // `onFirstFrame` is what the EC UI will listen to and only then show the video feed.
-    this.isFirstFrame = false;
+    const priming = this.isFirstFrame;
    await super.transform(frame, controller);
+    // Cleared only once a frame has been through the segmenter; a frame
+    // passed through untouched leaves it set.
+    if (priming && !this.isFirstFrame) this.onFirstFrame?.();
  }

  /**
@@ -103,10 +92,17 @@ export class BackgroundEffectTransformer extends BackgroundTransformer {
      inputElement: inputVideo,
    });

-    this.imageSegmenter = await createSegmenter(
-      this.canvas,
-      this.options.segmenterOptions,
-    );
+    this.imageSegmenter = await ImageSegmenter.createFromOptions(wasmFileset, {
+      baseOptions: {
+        modelAssetPath,
+        delegate: "GPU",
+        ...this.options.segmenterOptions,
+      },
+      canvas: this.canvas,
+      runningMode: "VIDEO",
+      outputCategoryMask: true,
+      outputConfidenceMasks: false,
+    });

    // BackgroundTransformer's own init applies these, and this one replaces it.
    if (this.options.imagePath) {
@@ -120,38 +116,3 @@ export class BackgroundEffectTransformer extends BackgroundTransformer {
    this.gl?.setBackgroundDisabled(this.options.backgroundDisabled ?? false);
  }
 }
-
-/**
- * Whether a segmenter can be built here, asked once before any camera depends
- * on one: a pipeline that fails to build takes the camera down with it.
- */
-export async function canSegment(): Promise<boolean> {
-  try {
-    (await createSegmenter(new OffscreenCanvas(1, 1))).close();
-    return true;
-  } catch (e) {
-    logger.warn("Background effects cannot run here", e);
-    return false;
-  }
-}
-
-/** On the GPU, or on the CPU where the GPU refuses, as a blocklisted one does. */
-async function createSegmenter(
-  canvas: HTMLCanvasElement | OffscreenCanvas | undefined,
-  segmenterOptions?: SegmenterOptions,
-): Promise<ImageSegmenter> {
-  const build = async (delegate: "GPU" | "CPU"): Promise<ImageSegmenter> =>
-    ImageSegmenter.createFromOptions(wasmFileset, {
-      baseOptions: { modelAssetPath, delegate, ...segmenterOptions },
-      canvas,
-      runningMode: "VIDEO",
-      outputCategoryMask: true,
-      outputConfidenceMasks: false,
-    });
-  try {
-    return await build("GPU");
-  } catch (e) {
-    logger.warn("Segmenting on the CPU, as the GPU refused", e);
-    return build("CPU");
-  }
-}
@@ -8,9 +8,11 @@ Please see LICENSE in the repository root for full details.
 import { act, createElement, type FC } from "react";
 import { render } from "@testing-library/react";
 import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
+import { BehaviorSubject } from "rxjs";

 import {
  BackgroundEffectsProvider,
+  reportCamera,
  useBackgroundEffects,
  createAppBackgroundEffects,
 } from "./BackgroundEffectsContext";
@@ -19,8 +21,10 @@ import {
  type BackgroundEffectsState,
 } from "../state/BackgroundEffects";
 import { backgroundEffect } from "../settings/settings";
+import { sdkCamera, type ShownCamera, SyncedCameraTrack } from "./cameraTrack";
 import { type AddedBackground } from "./backgroundImages";
-import { flushPromises, testScope } from "../utils/test";
+import { constant } from "../state/Behavior";
+import { flushPromises, mockVideoTrack, testScope } from "../utils/test";

 const sdkSupportMock = vi.hoisted(() => vi.fn(() => true));
 const pipelines = vi.hoisted(() => ({
@@ -56,10 +60,86 @@ vi.mock("./backgroundImages", async () => {
  };
 });
 vi.mock("./BackgroundEffectTransformer", () => ({
-  BackgroundEffectTransformer: vi.fn(function () {}),
-  canSegment: async (): Promise<boolean> => Promise.resolve(true),
+  BackgroundEffectTransformer: vi.fn(),
 }));

+describe("the synced camera", () => {
+  it("is the track last synced, and cleared only while still its own", () => {
+    const synced = new SyncedCameraTrack();
+    const pipeline = constant<BackgroundEffectsState>({
+      supported: false,
+      processor: undefined,
+      cameraTrack: synced,
+    });
+    const lobby = sdkCamera(mockVideoTrack({ id: "lobby" }));
+    const call = sdkCamera(mockVideoTrack({ id: "call" }));
+    const lobbyCamera$ = new BehaviorSubject<ShownCamera | null>(lobby);
+    reportCamera(testScope(), lobbyCamera$, pipeline);
+    expect(synced.track$.value).toBe(lobby);
+
+    const callScope = testScope();
+    reportCamera(callScope, constant(call), pipeline);
+    expect(synced.track$.value).toBe(call);
+
+    lobbyCamera$.next(null);
+    expect(synced.track$.value).toBe(call);
+    callScope.end();
+    expect(synced.track$.value).toBeNull();
+  });
+
+  it("reports the camera once, however often the pipeline's state changes", () => {
+    const synced = new SyncedCameraTrack();
+    const report = vi.spyOn(synced, "report");
+    const state$ = new BehaviorSubject<BackgroundEffectsState>({
+      supported: true,
+      processor: undefined,
+      cameraTrack: synced,
+    });
+    reportCamera(testScope(), constant(sdkCamera(mockVideoTrack({}))), state$);
+    state$.next({ ...state$.value, settling: true });
+    state$.next({ ...state$.value, settling: false });
+    expect(report).toHaveBeenCalledOnce();
+  });
+
+  it("is the SDK's camera once the call reports it", () => {
+    const synced = new SyncedCameraTrack();
+    const state$ = constant<BackgroundEffectsState>({
+      supported: true,
+      processor: undefined,
+      cameraTrack: synced,
+    });
+    const callCamera = mockVideoTrack({ facingMode$: constant("user") });
+    const callCamera$ = new BehaviorSubject<ShownCamera | null>(
+      sdkCamera(callCamera),
+    );
+    reportCamera(testScope(), callCamera$, state$);
+    expect(synced.track$.value).toBe(sdkCamera(callCamera));
+    expect(synced.track$.value?.facesUser()).toBe(true);
+
+    const element = document.createElement("video");
+    synced.track$.value!.attach(element);
+    expect(callCamera.attach).toHaveBeenCalledWith(element);
+
+    callCamera$.next(null);
+    expect(synced.track$.value).toBeNull();
+  });
+
+  it("keeps each call's camera to its own", () => {
+    const mine = createAppBackgroundEffects(testScope());
+    const theirs = createAppBackgroundEffects(testScope());
+    const first = sdkCamera(mockVideoTrack({ id: "first" }));
+    const second = sdkCamera(mockVideoTrack({ id: "second" }));
+    reportCamera(testScope(), constant(first), mine.state$);
+    reportCamera(testScope(), constant(second), theirs.state$);
+
+    expect(mine.state$.value.cameraTrack).not.toBe(
+      theirs.state$.value.cameraTrack,
+    );
+    expect(mine.state$.value.cameraTrack?.track$.value).toBe(first);
+    expect(theirs.state$.value.cameraTrack?.track$.value).toBe(second);
+  });
+});
+
 describe("BackgroundEffectsProvider", () => {
  let seen: BackgroundEffectsState[];
  const Surface: FC = () => {
@@ -5,6 +5,14 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */

+import {
+  combineLatest,
+  distinctUntilChanged,
+  EMPTY,
+  map,
+  Observable,
+  switchMap,
+} from "rxjs";
 import {
  BackgroundProcessorWrapper,
  supportsBackgroundProcessors,
@@ -12,10 +20,8 @@ import {
 import { createContext, type FC, type JSX, use } from "react";

 import { backgroundEffect as backgroundEffectSetting } from "../settings/settings";
-import {
-  BackgroundEffectTransformer,
-  canSegment,
-} from "./BackgroundEffectTransformer";
+import { BackgroundEffectTransformer } from "./BackgroundEffectTransformer";
+import { type ShownCamera } from "./cameraTrack";
 import { addedBackgrounds } from "./backgroundImages";
 import { type Behavior } from "../state/Behavior";
 import { type ObservableScope } from "../state/ObservableScope";
@@ -59,7 +65,6 @@ export function createAppBackgroundEffects(
    effect$: backgroundEffectSetting.value$,
    setEffect: backgroundEffectSetting.setValue,
    added$: addedBackgrounds.added$,
-    canSegment,
    pipeline: new BackgroundProcessorWrapper(transformer, "background-effect"),
    transformer,
  });
@@ -75,3 +80,32 @@ export const BackgroundEffectsProvider: FC<Props> = ({ effects, children }) => (
    {children}
  </BackgroundEffectsContext>
 );
+
+/**
+ * Reports the camera the pipeline is synced to while the scope lasts: the
+ * lobby's before joining, or the call's, each syncing its own.
+ */
+export function reportCamera(
+  scope: ObservableScope,
+  camera$: Observable<ShownCamera | null>,
+  backgroundEffectsState$: Behavior<BackgroundEffectsState>,
+): void {
+  // Keyed on the camera alone: reporting again for every change of state would
+  // blank the preview each time.
+  combineLatest([
+    camera$,
+    backgroundEffectsState$.pipe(
+      map(({ cameraTrack }) => cameraTrack),
+      distinctUntilChanged(),
+    ),
+  ])
+    .pipe(
+      switchMap(([camera, cameraTrack]) =>
+        camera === null || cameraTrack === undefined
+          ? EMPTY
+          : new Observable<never>(() => cameraTrack.report(camera)),
+      ),
+      scope.bind(),
+    )
+    .subscribe();
+}
@@ -5,8 +5,8 @@ SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
 Please see LICENSE in the repository root for full details.
 */

-import arc from "../graphics/background-arc.jpg?url&no-inline";
-import glow from "../graphics/background-glow.jpg?url&no-inline";
+import arc from "../graphics/background-arc.jpg?url";
+import glow from "../graphics/background-glow.jpg?url";

 export interface ShippedBackground {
  /** Stored in the user's settings when chosen, so it must not change. */
@@ -0,0 +1,61 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { BehaviorSubject } from "rxjs";
+import { type LocalVideoMediaTrack } from "@element-hq/matrixrtc-sdk";
+
+import { type Behavior } from "../state/Behavior";
+
+/**
+ * A camera that can be shown in a video element: the MatrixRTC SDK's track,
+ * before joining and in the call alike.
+ */
+export interface ShownCamera {
+  attach(element: HTMLVideoElement): void;
+  /** Detaches this element only: another may be showing the same camera. */
+  detach(element: HTMLVideoElement): void;
+  /** Whether it faces the user, so that it is shown mirrored. */
+  facesUser(): boolean;
+}
+
+// One per track, so that a view showing it isn't attached again on every render.
+const shown = new WeakMap<object, ShownCamera>();
+
+function shownOnce(track: object, make: () => ShownCamera): ShownCamera {
+  let camera = shown.get(track);
+  if (camera === undefined) {
+    camera = make();
+    shown.set(track, camera);
+  }
+  return camera;
+}
+
+/** A camera as the MatrixRTC SDK has it. */
+export function sdkCamera(track: LocalVideoMediaTrack): ShownCamera {
+  return shownOnce(track, () => ({
+    attach: (element): void => track.attach(element),
+    detach: (element): void => track.detach(element),
+    facesUser: (): boolean => track.facingMode$.value === "user",
+  }));
+}
+
+/**
+ * The camera track a background pipeline is synced to: the lobby's before
+ * joining, the call's after, none while the camera is off.
+ */
+export class SyncedCameraTrack {
+  private readonly subject$ = new BehaviorSubject<ShownCamera | null>(null);
+  public readonly track$: Behavior<ShownCamera | null> = this.subject$;
+
+  public report(track: ShownCamera): () => void {
+    this.subject$.next(track);
+    // Only if still this one, so a lobby leaving doesn't blank a call starting.
+    return (): void => {
+      if (this.subject$.value === track) this.subject$.next(null);
+    };
+  }
+}
@@ -0,0 +1,53 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { type FC } from "react";
+import { render } from "@testing-library/react";
+import { describe, expect, it, vi } from "vitest";
+
+import { useAttachedTrack } from "./useAttachedTrack";
+import { type ShownCamera } from "./tracks/cameraTrack";
+
+function cameraTrack(facing: string): ShownCamera {
+  return {
+    attach: vi.fn(),
+    detach: vi.fn(),
+    facesUser: (): boolean => facing === "user",
+  };
+}
+
+const Video: FC<{ track: ShownCamera | null }> = ({ track }) => {
+  const { videoRef, mirrored } = useAttachedTrack(track);
+  return <video ref={videoRef} data-mirrored={mirrored} />;
+};
+
+describe("useAttachedTrack", () => {
+  it("detaches only its own element from a track shown twice", () => {
+    const track = cameraTrack("user");
+    const first = render(<Video track={track} />);
+    const second = render(<Video track={track} />);
+    const [a, b] = [first, second].map((r) =>
+      r.container.querySelector("video"),
+    );
+    expect(track.attach).toHaveBeenCalledWith(a);
+    expect(track.attach).toHaveBeenCalledWith(b);
+
+    first.unmount();
+    expect(track.detach).toHaveBeenCalledExactlyOnceWith(a);
+  });
+
+  it("mirrors a camera facing the user, and only that", () => {
+    const { container, rerender } = render(
+      <Video track={cameraTrack("user")} />,
+    );
+    expect(container.querySelector("video")?.dataset.mirrored).toBe("true");
+    rerender(<Video track={cameraTrack("environment")} />);
+    expect(container.querySelector("video")?.dataset.mirrored).toBe("false");
+    rerender(<Video track={null} />);
+    expect(container.querySelector("video")?.dataset.mirrored).toBe("false");
+  });
+});
@@ -0,0 +1,31 @@
+/*
+Copyright 2026 Element Creations Ltd.
+
+SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+Please see LICENSE in the repository root for full details.
+*/
+
+import { type RefObject, useEffect, useRef } from "react";
+
+import { type ShownCamera } from "./tracks/cameraTrack";
+
+/**
+ * Shows a camera in the video element given the returned ref, and says
+ * whether to mirror it, as a camera facing the user is. Only that element is
+ * detached again: another may be showing the same camera.
+ */
+export function useAttachedTrack(camera: ShownCamera | null): {
+  videoRef: RefObject<HTMLVideoElement | null>;
+  mirrored: boolean;
+} {
+  const videoRef = useRef<HTMLVideoElement | null>(null);
+  useEffect(() => {
+    const element = videoRef.current;
+    if (!camera || !element) return;
+    camera.attach(element);
+    return (): void => {
+      camera.detach(element);
+    };
+  }, [camera]);
+  return { videoRef, mirrored: camera?.facesUser() ?? false };
+}
@@ -6,7 +6,6 @@ Please see LICENSE in the repository root for full details.
 */

 import { defineConfig } from "vite";
-import { posix } from "node:path";

 import { vitePluginsConfig } from "./vite.config.ts";
 import { scopeStylesToRoot } from "./component/build/scopeStylesToRoot.ts";
@@ -35,25 +34,6 @@ export default defineConfig(({ mode }) => {
    // whatever is in `public` — including the developer's own config.json, which
    // is not in the repository — into the output we would publish.
    publicDir: false,
-    // A library does not know where it will be served from, so every file it
-    // emits beside itself — the sounds, the pictures, MediaPipe's runtime — is
-    // referenced relative to the module's own URL. (A library build inlines
-    // each asset as a data URL unless its import says `no-inline`, so the
-    // imports do.)
-    base: "./",
-    experimental: {
-      // Relative to the chunk that references it, wherever that chunk lands,
-      // and spelled `./assets/…` rather than `assets/…`: a host's bundler reads
-      // a bare name as a package to look up.
-      renderBuiltUrl: (filename, { hostId, hostType }) => {
-        if (hostType !== "js") return { relative: true };
-        const relative = posix.relative(posix.dirname(hostId), filename);
-        const specifier = relative.startsWith(".") ? relative : `./${relative}`;
-        return {
-          runtime: `new URL(${JSON.stringify(specifier)}, import.meta.url).href`,
-        };
-      },
-    },
    // A host's document is not ours to style: everything in the stylesheet is
    // confined to the element Element Call is mounted in
    css: { postcss: { plugins: [scopeStylesToRoot()] } },
@@ -84,15 +64,6 @@ export default defineConfig(({ mode }) => {
        cssFileName: "element-call",
      },
      rollupOptions: {
-        output: {
-          // Hashed, as the app's are, so that a file a host serves as it is
-          // stays correct across versions of the package. Not the stylesheet,
-          // which the package exports by name (see `cssFileName`).
-          assetFileNames: ({ names }) =>
-            names.some((name) => name.endsWith(".css"))
-              ? "[name][extname]"
-              : "assets/[name]-[hash][extname]",
-        },
        // The host already has these, and a second copy of any of them does not
        // merely bloat the bundle: React would hold two sets of hooks, the
        // Matrix client would run two sync loops, and a second Compound would